Sitter \Sit"ter\, n.

1. One who sits; esp., one who sits for a portrait or a bust. [1913 Webster]

2. A bird that sits or incubates. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Sitter

Source: WordNet (r) 2.0
 

Sitter \Sit"ter\, n.

1. One who sits; esp., one who sits for a portrait or a bust.

2. A bird that sits or incubates.

Source: Webster's Revised Unabridged Dictionary (1913)