Dictionary
re•ten•tion
Pronunciation: (ri-ten'shun), [key]—
n.
1. the act of retaining.
2. the state of being retained.
3. the power to retain; capacity for retaining.
4. the act or power of remembering things; memory.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.