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definitions

stapler

1
[stey-pler]

noun

a machine for fastening together sheets of paper or the like, with wire staples.
a wire-stitching machine, especially one used in bookbinding.
Also called staple gun. a hand-powered tool used for driving heavy-duty wire staples into wood and other materials.

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Origin of stapler

1
First recorded in 1905–10; staple1 + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for staple gun

staple gun

noun

a mechanism that fixes staples to a surface

stapler

noun

a machine that inserts staples into sheets of paper, etc, to hold them together
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
Word Origin and History for staple gun

stapler

n.

mechanical device for driving staples, by 1949; agent noun from staple (v.).

Online Etymology Dictionary, © 2010 Douglas Harper