beep
Concise Oxford English Dictionary © 2008 Oxford University Press:
beep/biːp/
▶noun a short, high-pitched sound emitted by electronic equipment or a vehicle horn. ▶verb produce a beep.
■ chiefly N. Amer. summon with a device that beeps.
– derivatives
beeper noun.
beeper noun.
– origin 1920s: imitative.
'beep' also found in these Oxford entries:

