Licit

1. Not forbidden by formal or informal rules.
2. (law) Explicitly established or constituted by law.

Usage notes

Licit and valid are legal terms to be compared, especially in terms of canon law. Something that is licit (such as a marriage contract), may nonetheless be invalid, illegal or both (for example, a bigamous marriage), or vice versa.

Synonyms

(not forbidden): lawful, appropriate, legit, legitimate

(constituted): established, lawful, legal

Antonyms

(legal): illicit