bil'-o (gal, "a great rolling wave"): Figuratively, of trouble, "All thy waves and thy billows are gone over me" (Ps 42:7; compare Jon 2:3).
Bibliography Information Orr, James, M.A., D.D. General Editor. "Definition for 'BILLOW'". "International Standard Bible Encyclopedia". bible-history.com - ISBE; 1915.