ob·scure əbˈskyo͝or/ adjective 1. not discovered or known about; uncertain. "his origins and parentage are obscure" synonyms: unclear, uncertain, unknown, in doubt, doubtful, dubious, mysterious, hazy, vague, indeterminate, concealed, hidden antonyms: clear, obvious 2. not clearly expressed or easily understood. "obscure references to Proust" synonyms: abstruse, recondite, arcane, esoteric; antonyms: clear, plain 3. not important or well known. "an obscure religious sect" synonyms: little known, unknown, unheard of, unnoticed, undistinguished, unimportant, insignificant, inconsequential, minor, lowly; antonyms: famous, renowned 4. hard to make out or define; vague. "I feel an obscure resentment" synonyms: indistinct, faint, vague, nebulous, ill-defined, unclear, blurred, blurry, misty, hazy; antonyms: distinct (of a color) not sharply defined; dim or dingy. verb 1. keep from being seen; conceal. "gray clouds obscure the sun" synonyms: hide, conceal, cover, veil, shroud, screen, mask, cloak, cast a shadow over, shadow, block (out), obliterate, eclipse, darken antonyms: reveal 2. make unclear and difficult to understand. "the debate has become obscured by conflicting ideological perspectives" synonyms: confuse, complicate, obfuscate, cloud, blur, muddy antonyms: illuminate, clarify overshadow. "none of this should obscure the skill, experience, and perseverance of the workers"