■ noun
1》 a large flat serving dish.
↘a meal or selection of food placed on a ~.
2》 the rotating metal disc forming the turntable of a record player.
↘ informal, dated a gramophone record.
↘ Computing a rigid rotating disk on which data is stored in a disk drive; a hard disk.
Phrases
on a ( silver ) ~ informal indicating that something is achieved with little or no effort.
Origin
ME: from Anglo-Norman Fr. plater , from plat (see plate ).