gate-check. 1. v. In the case of a cabin attendant, to redirect luggage being carried onto a flight by a passenger to the checked luggage compartment in the plane's hold. Bags are gate-checked because they are too large to fit in overhead bins or under seats or because there is already too much luggage in the passenger cabin. 2. v. In the case of a passenger, to intentionally bring oversized luggage on a flight knowing that it will be gate-checked, thereby avoiding paying the airline's fee for checked bags. 3. n. The act of gate-checking.
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