1 the round part of a clock, watch, control on a machine, etc that shows a measurement of time, amount, temperature, etc 钟面；表面；（仪表等的）刻度盘，标度盘: a dial for showing air pressure 显示气压的刻度盘

2 the round control on a radio, cooker, etc that you turn to change sth （收音机、炉子等的）调节控制器

3 the round part with holes in it on some older telephones that you turn to call a number 电话拨号盘