'Mouser' definitions:

Definition of 'mouser'

(from WordNet)
noun
A cat proficient at mousing

Definition of 'Mouser'

From: GCIDE
  • Mouser \Mous"er\, n.
  • 1. A cat that catches mice; as, a good mouser is better than a dozen mousetraps. [1913 Webster +PJC]
  • 2. One who pries about on the lookout for something. [1913 Webster]

Synonyms of 'mouser'

From: Moby Thesaurus