undefined

adjective

1 the contract leaves some matters undefined:

unspecified, unexplained, nonspecific, unspecific, indeterminate, undetermined, unfixed, unsettled;

unclear, woolly, imprecise, inexact, indefinite, vague.

▷antonyms specific, definite.

2 the lights gave a gentle, warm glow with undefined shapes and shadows:

indistinct, indefinite, formless, indistinguishable, barely perceptible, vague, hazy, misty, shadowy, nebulous, dim, obscure, blurred, blurry, bleary, out of focus.

▷antonyms distinct, clear.