(n.) The act of permitting or allowing; formal consent; authorization; leave; license or liberty granted.

John Hancock OK acceptance accord acquiescence affirmance affirmation affirmative affirmative voice agreement allowance approbation approval assent authentication authorization aye blessing certification charter compliance confirmation connivance consent countenance countersignature diplomatic immunity discharge eagerness endorsement enfranchisement exception exemption franchise go-ahead green light immunity imprimatur indulgence laxity leave legislative immunity lenience leniency liberty license nod notarization okay patent permit privilege promptitude promptness ratification readiness release rubber stamp sanction seal sigil signature signet stamp stamp of approval submission subscription sufferance the nod tolerance ungrudgingness unloathness unreluctance validation visa vise warrant willingness