1. To billow forth; as of smoke or waves; SYN. wallow.
2. To move with great difficulty.
3. To rise and move, as in waves or billows; SYN. surge, heave.

ETYM Cf. Icel. bylgja billow, Dan. bölge, Swed. bölja; akin to Mid. High Germ. bulge billow, bag, and to Eng. bulge. Related to Bulge.
A large sea wave; SYN. surge.