Passport

Part of speech: noun (n.)

1. Permission to pass; a document given by the competent officer of a state, permitting the person therein named to pass or travel from place to place, without molestation, by land or by water. Caution in granting passports to Ireland. Clarendon.

2. A document carried by neutral merchant vessels in time of war, to certify their nationality and protect them from belligerents; a sea letter.

3. A license granted in time of war for the removal of persons and effects from a hostile country; a safe-conduct. Burrill.

4. Figuratively: Anything which secures advancement and general acceptance. Sir P. Sidney. His passport is his innocence and grace. Dryden.