beep
I
 /ˈbiːp/  noun  ,  pl   beeps [  count  ]
  : a short, high sound made by a horn, an electronic device, etc.
   the beep of a car horn
   Please leave a message after the beep.
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II
  verb  , beeps, beeped, beep·ing
  1 : to cause (a horn, an electronic device, etc.) to make a beep
   [  + obj  ] Why did you beep your horn at her?
   [  no obj  ] She beeped at me first.
    Something is beeping in the kitchen.
    I could hear a beeping noise.
  2 [  + obj  ] : to send a message to (someone) with a beeper
   The doctor is not in the office today, but I can beep her for you. [=I can send the doctor a signal that will tell her to call the office]