What is the meaning of Whaler?

One who hunts whales; a person employed in the whaling industry.

A seagoing vessel used for hunting whales.

One who whales (flogs or beats).

A large, strong person.

Something of unusually great size, a whopper, a whacker.

Any shark of the family Carcharhinidae; a requiem shark.

A sundowner; one who cruises about.

Source: wiktionary.org