Pronunciation: (un"dur-val'yOO), [key]
—v.t., -ued, -u•ing.
1. to value below the real worth; put too low a value on.
2. to diminish in value; make of less value.
3. to have insufficient regard or esteem for; hold too low an opinion of.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.