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- look in on
look in on
look in on somebody
to visit someone briefly The doctor said he'd look in on you tomorrow.
look in on
Pay a brief visit, as in
I'm just going to look in on Gail and the new baby; I won't stay long. [c. 1600] Also see
look someone in the face.
look in on
To visit: I look in on my grandparents each weekend.