IPA: /ˈpleɪnloʊd/
KK: /ˈpleɪnloʊd/
The total amount of cargo or passengers that an airplane can carry at one time.
The flight was delayed because the planeload of luggage had not arrived yet.
Planeload is formed from "plane" (from Latin *planus*, meaning flat or level) and "load" (from Old English *lād*, meaning a burden or cargo). The word "planeload" refers to the amount of cargo or passengers that a plane can carry, emphasizing the flat surface of the aircraft used for transport.
Think of a 'plane' being 'flat' ('planus') and carrying a 'load' ('lād') of cargo or passengers — that's what a planeload means.