The dial of a watch or clock on which the hours have been marked with a radium compound to make them luminous

(transitive, telephony) To dial using speed dial.

A function on some telephones allowing a phone number to be dialed by pressing only one or two keys.

plural of dial-up

(colloquial) To accidentally make a call this way.

(colloquial) A situation when one's cellphone makes a call from one's back pocket where its buttons are being inadvertently pressed

A telephony signal, usually in the form of a sound, used to indicate that the telephone exchange is working, has recognized an off-hook, and is ready to accept a call.

plural of dial tone

The practice of having a computer dial large numbers of telephone numbers in search of devices that can be exploited, such as fax machines or modems.

To have a computer dial a large number of phone numbers in search of devices for exploitation, such as modems or fax machines.