1 [count] : an often very large animal that lives in the ocean and that is a mammal rather than a fish — see also blue whale, humpback whale, killer whale, sperm whale 2 [singular] informal : something that is very big, important, good, etc. — + of ▪ It became one whale of a problem. [=a very big problem] ▪ We had a whale of a time [=a great time] at the party.








