The process of evolution was necessarily unconscious and undeliberate.
The action of animals of a given kind were supposed to be after one perfect model, and to be undeliberate.
But his companion had already vanished in the thicket with the undeliberate and impulsive act of an animal.
A rough movement, a too undeliberate speech, and the absurdity of the thing might be given away.
early 15c., "done with careful consideration," from Latin deliberatus "resolved upon, determined," past participle of deliberare (see deliberation). Meaning "slow, consciously unhurried" is attested by 1590s. Related: Deliberately.