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Definitions

intelligent

[in-tel-i-juhnt] / ɪnˈtɛl ɪ dʒənt /
ADJECTIVE
very smart
Synonyms
STRONGEST
astute brainy bright brilliant creative imaginative inventive knowledgeable original perceptive rational resourceful smart well-informed wise
WEAK
able acute alert alive all there apt calculating capable clever comprehending deep discerning enlightened exceptional highbrow ingenious instructed keen knowing penetrating perspicacious profound quick quick-witted ready reasonable responsible sage sharp thinking together understanding whiz witty
Antonyms
STRONGEST
dark dull ignorant normal old stupid typical unaware uncreative uneducated unimaginative unintelligent uninventive unreasonable unresourceful worn
WEAK
foolish idiotic imbecile

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

My best guess is that Cassidy and Kaine themselves — being the intelligent and diligent legislators they are — would prefer a serious approach and offer this proposal simply to move their colleagues to action.

From MarketWatch • Apr. 9, 2026

Ironically, such unpleasantness can inspire as many calm, intelligent chats as “The Drama” already has.

From Salon • Apr. 9, 2026

“But I think we are intelligent enough to know what we need to do.”

From Los Angeles Times • Apr. 7, 2026

But for a robot to carry out lots of varied, complex tasks, it needs an intelligent brain powered by a different form of AI, called agentic AI.

From BBC • Apr. 7, 2026

"No, it wouldn't. That's where you make your big mistake. Because you're not intelligent."

From "The Sun Also Rises" by Ernest Hemingway