A lack of good judgment or care in behavior, especially in a situation where it is important to act carefully. His indiscretion at the meeting cost him the respect of his colleagues.
An act or remark that shows a lack of good judgment, often causing embarrassment or trouble. The politician's indiscretion was quickly picked up by the media.
A minor sexual or romantic misdeed, especially one considered improper or secret. The ambassador resigned after an indiscretion with a junior aide became public.