Keith "Two-Bit" Mathews is the oldest member of the greaser gang, a wisecracking, shoplifting, eighteen-and-a-half-year-old junior whose relentless humor and loyalty define his role as the group's comic relief and moral anchor.

Gallant is a key concept in The Outsiders, representing a code of honorable, self-sacrificing courage that Johnny Cade redefines through his final actions, contrasting with the gang's usual toughness and providing a moral framework for Ponyboy's understanding of heroism.

Tuff is a slang term used by the greasers in The Outsiders to mean cool, sharp, or admirable, distinct from the word tough which means rough or hard. It functions as a key marker of greaser identity and values, appearing in descriptions of cars, records, and personal style, and is contrasted with the Socs' world.

Buck Merril's place is a rowdy, alcohol-fueled rodeo cowboy's home that serves as a crucial hideout and resource hub for the greaser gang, particularly Dallas Winston, and is the location where Ponyboy and Johnny seek help after Bob Sheldon's murder.

The East Side is the working-class neighborhood in Tulsa, Oklahoma, where Ponyboy Curtis and the greasers live, defined by poverty, a tight-knit community, and constant conflict with the wealthy Socs from the West Side.

Jay's is a greaser hangout in the novel, a drive-in restaurant on the East Side where the gang socializes and where the social divide between greasers and Socs is reinforced through territory and reputation.

The Tasty Freeze is a neighborhood grocery store and grease hang-out in The Outsiders, serving as a site of casual social gathering and a tense confrontation between Ponyboy Curtis and three Socs after the rumble.

The church on Jay Mountain is the abandoned rural hideout where Ponyboy Curtis and Johnny Cade take refuge after Johnny kills Bob Sheldon, and it becomes the site of a transformative fire rescue that redefines their identities from fugitives to heroes.

The park is a central location in The Outsiders, serving as the site of Bob Sheldon's murder and a recurring symbol of the violent conflict between the greasers and the Socs. It is a small, two-block square park with a fountain and a swimming pool, located on the East Side, and it becomes the stage for the novel's most pivotal and tragic events.

The vacant lot is the central gathering place for the greaser gang on the East Side, serving as the primary setting for key events including the murder of Bob Sheldon, the rumble, and Dally Winston's death, and symbolizing both the gang's unity and the violence that defines their world.

The Way Out is a West Side drive-in restaurant frequented by the Socs, the wealthy social group that stands in opposition to the greasers. It serves as a symbol of the economic and social divide that structures the novel's central conflict, representing the territory and lifestyle of the privileged class.

The West Side is the affluent, predominantly Soc (Social) neighborhood in Tulsa that stands in stark economic and cultural opposition to the greasers' East Side. It represents the world of privilege, social power, and emotional detachment that the greasers both resent and, in some cases, secretly envy, and its residents' actions—from casual harassment to organized rumbles—drive the novel's central conflict.

The relationship between Darry and Ponyboy Curtis is the central emotional conflict of The Outsiders, a strained bond between two brothers who, after the death of their parents, struggle to understand each other across a gulf of age, responsibility, and temperament. Darry, the eldest, has sacrificed his future to keep the family together, and his intense pressure on Ponyboy is born of fear and love, while Ponyboy perceives it as coldness and rejection. Their journey from open conflict to a hard-won, tearful reconciliation forms the novel's emotional core, teaching Ponyboy that love can wear a stern face.

Madame Arnulfi is the shrewd, black-haired widow of the Grasse perfumer Honoré Arnulfi, who runs the family workshop with a tight grip on finances and a pragmatic reliance on her first journeyman, Dominique Druot, whom she later marries. She embodies the commercial acumen of the Grasse perfume trade, balancing frugality with sharp business instincts, and her workshop becomes the setting where Grenouille perfects the cold-enfleurage techniques he needs for his ultimate project.

This expression encapsulates the novel's central thesis: scent possesses an irresistible, pre-rational power that bypasses intellect, will, and emotion, entering the body directly through breath and dictating human responses of love, hate, desire, and disgust. The novel repeatedly demonstrates this principle through Grenouille's manipulation of others via perfume, the crowd's helpless surrender to his crafted aura, and the fundamental vulnerability of all people to olfactory persuasion.

Grenouille's brief stay with Father Terrier is a pivotal early episode in which the infant's odorlessness is first detected and interpreted as a sign of diabolical possession, leading to his rejection by the wet nurse Jeanne Bussie and his subsequent placement with Madame Gaillard. This encounter establishes the central mystery of Grenouille's lack of human scent and foreshadows his lifelong alienation from humanity.

The Foundling Transport Regulation was a bureaucratic rule in eighteenth-century Paris that governed the shipment of foundlings and orphans to the great public orphanage in Rouen. It required that only baptized infants with an official certificate of transport be conveyed, and it was this regulation that indirectly saved Jean-Baptiste Grenouille from being sent on a deadly convoy and instead led to his placement at the cloister of Saint-Merri.

Grenouille's inner empire of scents is the vast, meticulously catalogued olfactory universe he constructs within his own mind, a fortress of remembered and imagined odours that serves as his sole refuge from a hostile, stinking world and the foundation for his ambition to become the greatest perfumer who ever lived.

The Antarctic Ice Escape is the harrowing ordeal in which the Nautilus, trapped beneath the Antarctic Ice Bank after reaching the South Pole, is nearly crushed and suffocated before its crew and passengers manage to break free through a combination of brute force, engineering ingenuity, and sheer desperation.

The Capture by the Nautilus is the pivotal event in which Professor Pierre Aronnax, his servant Conseil, and the Canadian harpooner Ned Land are forcibly taken aboard Captain Nemo's submarine after being thrown overboard from the American frigate Abraham Lincoln, marking their transition from hunters to prisoners and initiating their extraordinary underwater journey.

The Final Escape and the Maelstrom is the climactic sequence in which Professor Aronnax, Ned Land, and Conseil finally break free from the Nautilus, only to be caught in the terrifying Moskstraumen whirlpool off the Norwegian coast, an event that ends their imprisonment and nearly costs them their lives.

The Pearling Expedition and Shark Attack is a pivotal action sequence in which Captain Nemo, accompanied by Professor Aronnax, Conseil, and Ned Land, visits the pearl fisheries off Mannar Island near Ceylon. During the dive, a giant shark attacks an Indian pearl diver, and Nemo intervenes in a desperate hand-to-hand struggle. Ned Land ultimately kills the shark with his harpoon, saving Nemo's life. Nemo then revives the diver and gives him a bag of pearls, an act that reveals his deep compassion for the oppressed and hints at his own origins in a colonized land.

The South Pole Claim is the climactic act of Captain Nemo's assertion of absolute sovereignty, in which he reaches the geographic South Pole on March 21, 1868, plants a black flag bearing a gold 'N', and declares the entire polar region his personal domain, an act that crystallizes his self-conception as a law unto himself and foreshadows his final, catastrophic exercise of vengeance.

The sea, in Jules Verne's Twenty Thousand Leagues Under the Sea, is not merely a setting but a central philosophical concept, representing the ultimate source of freedom, independence, and a radical alternative to the oppressive structures of human society on land. For Captain Nemo, the ocean is a realm where he can escape tyranny, establish his own laws, and live a life of complete autonomy, a vision that is both liberating and tragically isolating.

The giant clam is a colossal bivalve mollusk encountered by Professor Aronnax and his companions during their underwater tour aboard the Nautilus. It serves as a symbol of the ocean's hidden, incalculable wealth and of Captain Nemo's intimate, proprietary relationship with the sea's most secret treasures.

The narwhale, or sea unicorn, is the marine creature that Professor Pierre Aronnax hypothesizes as the identity of the mysterious sea monster in his April 30, 1867 article for The New York Herald, a theory that shapes the initial public and scientific understanding of the phenomenon before the true nature of the Nautilus is revealed.

The sea otter is a rare, valuable marine mammal encountered during the Nautilus's underwater hunting expedition near Crespo Island, where Captain Nemo shoots one for its prized pelt, and it later serves as a symbol of the ocean's vulnerable, threatened wildlife.

The Coral Burial of a Crewman is a pivotal event in which Captain Nemo and his crew bury a deceased comrade in an underwater cemetery deep within the coral forests of the Indian Ocean, revealing the captain's profound humanity, his rejection of the surface world, and the Nautilus community's unique relationship with death and the sea.

The First Meeting with Captain Nemo and the Agreement is the pivotal event in which the mysterious commander of the Nautilus reveals himself to his captives, establishes the terms of their confinement, and formally introduces himself as Captain Nemo, thereby setting the ethical and psychological framework for the entire voyage.

The Journey to the South Pole and the Breaking of the Ice Barrier is the pivotal Antarctic expedition of the Nautilus, during which Captain Nemo reaches the geographic South Pole, claims it in his own name, and then faces a life-or-death struggle when the submarine becomes trapped beneath the polar ice cap, ultimately escaping through a combination of engineering ingenuity and sheer force.