Lacking definite form or limits:
— Nebulous distinction between pride and conceit.

synonyms: cloudy, nebulose.

Roget 353: bubbling etc. v.; frothy, nappy^†, effervescent, sparkling, mousseux [Fr.], frothy [Fr.Tr.], up.    cloudy etc. n.; thunderheaded^†; vaporous, nebulous, overcast.    ... show more

Roget 519: unintelligible, unaccountable, undecipherable, undiscoverable, unknowable, unfathomable; incognizable^†, inexplicable, inscrutable; inapprehensible^†, incomprehensible; insolvable^†, insoluble; impenetrable.    illegible, as Greek to one, unexplained, paradoxical; enigmatic, enigmatical, puzzling (secret) 533; indecipherable.    obscure, dark, muddy, clear as mud, seen through a mist, dim, nebulous, shrouded in mystery; opaque, dense; undiscernible etc. (invisible) 447^†; misty etc. (opaque) 426; hidden etc. 528; latent etc. 526.    indefinite, garbled etc. (indistinct) 447; perplexed etc. (confused) 59; undetermined, vague, loose, ambiguous; mysterious; mystic, mystical; acroamatic^†, acroamatical^†; metempirical; transcendental; occult, recondite, abstruse, crabbed.    inconceivable, inconceptible^†; searchless^†; above comprehension, beyond comprehension, past comprehension; beyond one's depth; unconceived.    inexpressible, undefinable, incommunicable.    unpredictable, unforeseeable.    ... show more

Polish: mgławicowy

Of or relating to or resembling a nebula.

synonym: nebular.

Roget 422: dim, dull, lackluster, dingy, darkish, shorn of its beams, dark 421.    faint, shadowed forth; glassy; cloudy; misty etc. (opaque) 426; blear; muggy^†, fuliginous^†; nebulous, nebular; obnubilated^†, overcast, crepuscular, muddy, lurid, leaden, dun, dirty; looming etc. v.. pale etc. (colorless) 429; confused etc. (invisible) 447.    ... show more

Polish: mgławicowy

Lacking definition or definite content:
— Nebulous reasons.

synonym: unfixed.