Meaning of castoff

cast•off

Pronunciation: (kast'ôf", -of", käst'-), [key]
— adj.
  1. thrown away; rejected; discarded: castoff clothing.
—n.
  1. a person or thing that has been cast off.
  2. the estimate by a compositor of how many pages copy will occupy when set in type.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.