Ob″li‐ga‐to‐ry (?), a. [L. obligatorius: cf. F. obligatoire.] Binding in law or conscience; imposing duty or obligation; requiring performance or forbearance of some act; — often followed by on or upon; as, obedience is obligatory on a soldier.
As long as the law is obligatory, so long our obedience is due. Jer. Taylor.