Curious definition: Eager to learn more.Find Similar Words Find similar words to curious using the buttons below. Curious, inquisitive, meddlesome, prying refer to taking an undue (and petty) interest in others' affairs. Curious implies a desire to know what is not properly one's concern: curious about a neighbor's habits. Learn the meaning of curious as an adjective to describe someone or something that is interested, unusual, or strange. Find synonyms, antonyms, pronunciation, and usage examples of curious in British and American English. CURIOUS definition: 1. interested in learning about people or things around you: 2. strange and unusual: 3…. Learn more.