nebulous

1 having an often intentionally veiled or uncertain meaning made nebulous references to some major changes the future may hold Synonyms ambiguous, arcane, cryptic, dark, deep, Delphic, double-edged, elliptical (or elliptic), enigmatic (also enigmatical), equivocal, fuliginous, inscrutable, murky, mysterious, mystic, obscure, occult, opaqueRelated Words abstruse, esoteric, recondite; cloaked, concealed, disguised, masked, shrouded; beclouded, bedimmed, befogged, clouded, cloudy, dim, faint, foggy, fuzzy, hazy, indistinct, indistinguishable, misty, muddy, obfuscatory, obnubilated, obscurant (or obscurantic), shaded, shadowlike, shadowy, sphinxlike; indefinite, inexact, inexplicit, noncommittal, questionable, unclear, uncertain, undefined, undetermined, vague; impenetrable, incomprehensible, indecipherable, inexplicable; eerie (also eery), uncanny, weird; impalpable, inappreciable, intangible, invisible; unanswerable, unknowable; baffling, bewildering, confounding, confusing, mystifying, perplexing, puzzling, unfathomable; circuitous, indirect, roundabout; complex, complicated, difficult, obtuseNear Antonyms comprehensible, fathomable, intelligible, knowable, legible, pellucid, understandable; bright, distinct, evident, self-evident, self-explanatory; certain, firm, strong, sure; defined, determined; direct, straightforward; definite, exact, explicit; appreciable, palpable, tangible, visible; blatant, patent, unmistakableAntonyms accessible, clear, nonambiguous, obvious, plain, unambiguous, unequivocal

2 not seen or understood clearly could just make out the nebulous outline of a fishing shack in the dense fog Synonyms blear, bleary, blurry, dim, foggy, fuzzy, gauzy, hazy, indefinite, indistinct, indistinguishable, misty, murky, faint, obscure, opaque, pale, shadowy, unclear, undefined, undetermined, vagueRelated Words dark, dusky, gloomy; impalpable, inappreciable, intangible, invisible; hieroglyphic (also hieroglyphical), incomprehensible, indecipherable, indiscernible, inexplicable, mysterious, obfuscatory, puzzlingNear Antonyms bright, distinct, evident, obvious, plain; certain, firm, strong, sureAntonyms clear, definite, pellucid