Pronunciation: (sûr"kum-val'āt), [key]
—adj., v., -lat•ed, -lat•ing.
1. surrounded by or as if by a rampart.
2. Anat.surrounded by a depression or wall-like ridge.
to surround with or as if with a rampart.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.