From Old French harpon, from Latin harpaga, from Ancient Greek ἁρπάγη (harpagē, “hook”), from ἁρπάζω (harpazō, “to snatch away, to carry off, to seize, to captivate”).
harpoon (plural harpoons)
- A spearlike weapon with a barbed head used in hunting whales and large fish.
- (slang) A harmonica.
Derived terms 
harpoon (third-person singular simple present harpoons, present participle harpooning, simple past and past participle harpooned)
- (transitive) To hunt something with a harpoon.
See also