KJV Dictionary Definition: billow
BIL'LOW, n. A great wave or surge of the sea, occasioned usually by violent wind. It can hardly be applied to the waves of a river, unless in poetry, or when the river is very large.
BIL'LOW, v.i. To swell; to rise and roll in large waves, or surges.
BIL'LOWING, ppr. Swelled into a large waves or surges.