Meaning of “dial” - Learner’s Dictionary

dial

noun [ C ] uk us /daɪəl/
TIME/MEASUREMENT

the round part of a clock, watch, or machine that shows you the time or other measurement

BUTTON

a round part on a piece of equipment such as a television or radio that you turn to operate it, make it louder, etc

TELEPHONE

the ring of holes with numbers that you turn on the front of an old telephone

(Definition of “dial noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)