'Mounter' definitions:

Definition of 'mounter'

From: WordNet
noun
A skilled worker who mounts pictures or jewels etc.
noun
Someone who ascends on foot; "a solitary mounter of the staircase" [syn: mounter, climber]

Definition of 'Mounter'

From: GCIDE
  • Mounter \Mount"er\, n.
  • 1. One who mounts. [1913 Webster]
  • 2. An animal mounted; a monture. [Obs.] [1913 Webster]