nebulous

adjective

1 the figure was still nebulous—she couldn't quite see it:

indistinct, indefinite, unclear, vague, hazy, cloudy, fuzzy, misty, lacking definition, blurred, blurry, out of focus, foggy, faint, shadowy, dim, obscure, shapeless, formless, unformed, amorphous;

rare nebulose.

▷antonyms clear.

2 his nebulous ideas about salvation:

vague, ill-defined, unclear, hazy, uncertain, indefinite, indeterminate, imprecise, unformed, muddled, confused, ambiguous, inchoate, opaque, muddy.

▷antonyms well defined.

nebulous Oxford Dictionary of English