a device for shooting a barbed missile under water, usually by means of gas under pressure, a strong rubber band, or a powerful spring.
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How to use spear gun in a sentence
Ashe dug the butt of his spear-gun into the sand on the flooring to uncover another oval depression.Key Out of Time | Andre Alice Norton
When carrying a spear gun or his camera, he also swam with arms hanging downward.
He looked back in time to see Scotty sight the spear gun and fire as the boat went past.
The spear gun was extended, the spear point nearing firing range.
They donned their equipment, then Rick picked up a spear gun while Tony selected a wrecking bar from his equipment.
British Dictionary definitions for spear gun
a device for shooting spears underwater
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012