Bil″low (�), n. [Cf. Icel. bylgja billow, Dan. bölge, Sw. bölja; akin to MHG. bulge billow, bag, and to E. bulge. See Bulge.] 1. A great wave or surge of the sea or other water, caused usually by violent wind.
Whom the winds waft where'er the billows roll.
Cowper.
2. A great wave or flood of anything. Milton.