letterbox (aspect ratio of film transferred to video)

checkbox (a window item, on the computer screen, which toggles check/uncheck by a single click)

beatbox

minivan

aerial photography

to heat empty cookware (as when forgetting to put water in a kettle, pot, etc.); to dry heat cookware

heating empty cookware (as when forgetting to put water in a kettle, pot, etc.); dry heating cookware

(military, of the Japan Air Self-Defense Force) a lieutenant general

(military, of the Japan Air Self-Defense Force) a field officer

(military, of the Japan Air Self-Defense Force) an airman