Of an action, behaviour, belief, etc.: resulting from or characterized by undue haste or a lack of consideration; rash, reckless.

Of actions: Done incautiously.

Of actions, etc.: Not marked by circumspection; incautious.

Not wary; unguarded, incautious. Of actions, conduct, the mind, etc.

Of expressions, actions, etc.: Incautious, imprudent; careless.

Occurring when a person is not mentally watchful; unguarded.