DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   busy-wait
      <programming> To wait for an event by spinning through a
      tight loop or timed-delay loop that polls for the event on
      each pass, as opposed to setting up an interrupt handler and
      continuing execution on another part of the task.  This is a
      wasteful technique, best avoided on time-sharing systems
      where a busy-waiting program may hog the processor.
      [Jargon File]
      (1999-06-10)