1. behavior or actions that lack good judgment, wisdom, or prudence; acting in a silly or senseless manner
His foolish conduct at the meeting embarrassed the entire team.
Sua conduta tola na reunião envergonhou todo o time.
2. irresponsible or imprudent behavior that shows lack of common sense
The foolish conduct of the driver put many lives at risk.
A conduta tola do motorista colocou muitas vidas em risco.