plural of flight nurse

A compression sock for use in prolonged periods of sitting during air travel.

plural of flight sock

(chess) An unattacked square to which the king can therefore move, usually in the context of checks.

plural of flight square

An arrangement between two countries, states, or other administrative regions, that allows free air travel of residents between them while otherwise keeping their borders closed to travellers from outside the bubble.

plural of flight bubble

plural of ghost flight

(aviation) An empty or near-empty flight run by an airline to fulfill contractual obligations.

plural of flight instrument