conscience Definition

conscience
noun

1. The moral sense of right and wrong that determines someone's thoughts and behaviour.

Thesaurus: morals, principles, ethics, scruples, standards.

Idiom: in all conscience

By any normal standard of fairness.
Thesaurus: rightly, justly, fairly, properly.

Idiom: on one's conscience

Making one feel guilty.

Etymology: 13c: French, from Latin conscientia knowledge within oneself, from con together + scire to know.