Roget's Thesaurus: Entry 455 (The desire of knowledge)

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#455. [The desire of knowledge.] Curiosity. -- N. interest, thirst for knowledge, thirst for truth; curiosity, curiousness; inquiring mind; inquisitiveness.

omnivorous intellect, devouring mind.

[person who desires knowledge] inquirer; sightseer; quidnunc[Lat], newsmonger, Paul Pry, eavesdropper; gossip &c. (news) 532; rubberneck; intellectual; seeker[inquirer after religious knowledge], seeker after truth.

V. be curious &c. adj.; take an interest in, stare, gape; prick up the ears, see sights, lionize; pry; nose; rubberneck*[U . S.].

Adj. curious, inquisitive, burning with curiosity, overcurious; inquiring &c. 461; prying, snoopy, nosy, peering; prurient; inquisitorial, inquisitory[obs]; curious as a cat; agape &c. (expectant) 507.

Phr. what's the matter? what next? consumed with curiosity; curiosity killed the cat, satisfaction brought it back. "curiouser and curiouser" [Alice in Wonderland].