Definition of long-play in US English:

long-play

adjective

  • Long-playing.

noun

  • 1Long-playing records collectively; the long-playing format.

  • 2A feature of video recorders and camcorders which increases the amount of material which can be recorded on a given length of tape; especially a mechanism enabling the tape to be played at a fraction of its normal speed (typically a half or a quarter).

Origin

1940s; earliest use found in Daily Mail (Hagerstown, Maryland). From long + play. With the use as adjective compare earlier long-playing.

Pronunciation

long-play

/ˌlɒŋˈpleɪ/