an animal that catches mice: Our cat is a good mouser.
a person or thing that seeks or prowls, as if for prey.

Nearby words

  1. mousefish,
  2. mousehole,
  3. mousemat,
  4. mouseover,
  5. mousepox,
  6. mousetail,
  7. mousetrap,
  8. mousey,
  9. mousing,
  10. mousquetaire

Origin of mouser

Middle English word dating back to 1350–1400; see origin at mouse, -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mouser

British Dictionary definitions for mouser



a cat or other animal that is used to catch mice: usually qualifieda good mouser
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 mouser



"cat that hunts mice," c.1400, agent noun from mouse (v.).

Online Etymology Dictionary, © 2010 Douglas Harper