Definition of call in on
- I called in on an old friend while I was in New York on business.
: to speak in a loud distinct voice so as to be heard at a distance : shout
: to make a request or demand
: to utter a characteristic note or cry
: an act of calling with the voice : shout
: an imitation of the cry of a bird or other animal made to attract it
: an instrument used for calling
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