di·al / ˈdī(ə)l/ • n. a face of a clock, watch, or sundial that is marked to show units of time. ∎ a similar face or flat plate with a scale and pointer for showing measurements of weight, volume, pressure, compass direction, etc. ∎ a disk with numbered holes on a telephone, enabling someone to make a call by inserting a finger in each of the holes corresponding to the number to be called and turning the disk. ∎ a plate or disk on a radio, stove, washing machine, or other piece of equipment that is tuned to select a wavelength or setting.• v. (di·aled, di·al·ing; Brit. di·alled, di·al·ling) [tr.] call (a telephone number) by turning a disk with numbered holes or pressing a set of buttons: he dialed room service | [intr.] company employees dial out from their office. ∎ (dial something up) gain access to a service using a telephone line: plans to enable customers to dial up videos from their living room. ∎ indicate or regulate by means of a dial: you're expected to dial in volume and tone settings.