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.