Longman Dictionary of Contemporary English - belt

~1 n 1 »CLOTHES« a band of leather, cloth etc that you wear around your waist 2 »AREA« a large area of land that has particular characteristics  (America's farming belt | the commuter belt)  (- see also green belt) 3 »MACHINE PART« a circular band of material such as rubber that connects or moves parts of a machine  (- see also conveyor belt, fan belt) 4 below the belt informal a remark or criticism that is below the belt is unfair or cruel  (That was a bit below the belt, Paul.) 5 have/get sth under your belt to have achieved something useful or important  (You need some work experience under your belt.) 6 (at) full belt spoken moving as quickly as possible  (Willy was off down the road at full belt.) 7 give sb a belt spoken to hit someone hard  (- see also chastity belt, garter belt, suspender belt, tighten your belt tighten (6)) ~2 v informal 1 to hit someone or something hard  (Dan belted the ball at goal.) 2 BrE to travel very fast + down/along etc  (We were belting down the motorway at 95 miles per hour.) belt sth out ~ phr v informal to sing a song or play an instrument loudly  (She was belting out old Broadway favourites.) belt up ~ phr v BrE spoken used to tell someone rudely to be quiet  (Belt up, for Christ's sake!)