All 8 Uses of

eccentric

in

This Side of Paradise

Later, however, he lost his mind and ran madly up the street, bumping into fences, rolling in gutters, and pursuing his eccentric course out of Amory's life.†
Chpt 1.1

Those qualities for which he had suffered, his moodiness, his tendency to pose, his laziness, and his love of playing the fool, were now taken as a matter of course, recognized eccentricities in a star quarter-back, a clever actor, and the editor of the St. Regis Tattler: it puzzled him to see impressionable small boys imitating the very vanities that had not long ago been contemptible weaknesses.†
Chpt 1.1

eccentricities = unconventional or strange behaviors

"It's odd," Amory said to Tom one night when they had grown more amicable on the subject, "that the people who violently disapprove of Burne's radicalism are distinctly the Pharisee class—I mean they're the best-educated men in college—the editors of the papers, like yourself and Ferrenby, the younger professors....The illiterate athletes like Langueduc think he's getting eccentric, but they just say, 'Good old Burne has got some queer ideas in his head,' and pass on—the Pharisee class—Gee!†
Chpt 1.4

"You're getting a reputation for being eccentric," said Alec, laughing, "if that's what you mean."†
Chpt 1.4

bringing the most eccentric characters to dinner,
Chpt 1.4 *

eccentric = unconventional or strange

Gillespie after several cocktails was in a talkative mood; he began by telling Amory that he was sure Rosalind was slightly eccentric.†
Chpt 2.1

Definition:

unconventional or strange; or a person with such traits