The soundtrack of laughter sounds that accompanies a television comedy show

A technique used by bicycle riders to remain virtually stationary by adjusting their weight

(cycle racing) A form of cycling on a specially-designed track, especially, a velodrome

The continuous monitoring of the position and range of a remote object using radio

A song, especially a hip hop or rap recording intended to disparage or attack another person or group.

A continuous track in the form of a steel or rubber belt fitted instead of wheels to crawlers, bulldozers, excavators, loaders, backhoes, tanks and similar off-road vehicles.

A system of lightbulbs that are affixed movably to tracks.

To forget one's train of thought or temporarily misplace an item or its place in a sequence.

(figuratively, singular only) A well-populated area or well-trodden path; any busy area.

present participle of lose track