Noun
An inner sense which distinguishes what is right from what is wrong, functioning as a guide for morally appropriate behaviour.
Synonyms: conscience, moral sense
A belief system, person, etc. serving as a guide for morally appropriate behaviour.
(archaic) The full range of actions, vices, or virtues, which may affect others and which are available as choices to a person, group, or people in general.
Source: en.wiktionary.org