(countable and uncountable, plural moral compasses)
- (usually countable, idiomatic, ethics) An inner sense which distinguishes what is right from what is wrong, functioning as a guide (like the needle of a compass) for morally appropriate behavior.
- (usually countable, idiomatic, ethics) A person, belief system, etc. serving as a guide for morally appropriate behavior.
- (usually uncountable, archaic, idiomatic, ethics) The full range of virtues, vices, or actions which may affect others and which are available as choices (like the directions on the face of a compass) to a person, to a group, or to people in general.