stapler

1
[ stey-pler ]
/ ˈsteɪ plər /

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.

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 (1 of 2)

staple gun

noun

a mechanism that fixes staples to a surface

British Dictionary definitions for staple gun (2 of 2)

stapler
/ (ˈsteɪplə) /

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