Meaning of drop-in

drop-in

Pronunciation: (drop'in"), [key]
— n.
  1. a person who or thing that pays an unexpected or uninvited visit: a feeder for squirrels, raccoons, and other drop-ins.
  2. a social gathering at which the guests are not expected to stay long: Be sure to stop by our house for a glass of eggnog at our Christmas drop-in.
—adj.
  1. provided for short-term patronage: a drop-in shelter for the homeless.
  2. requiring only insertion to be ready for use: a drop-in film cartridge.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.