Pronunciation: (kō"u-les'), [key]
—v., -lesced, -lesc•ing.
1. to grow together or into one body: The two lakes coalesced into one.
2. to unite so as to form one mass, community, etc.: The various groups coalesced into a crowd.
3. to blend or come together: Their ideas coalesced into one theory.
to cause to unite in one body or mass.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.