1. One who sits; esp., one who sits for a portrait or a bust.
2. A bird that sits or incubates.
n 1: Dutch astronomer who calculated the size of the universe and
suggested that it is expanding (1872-1934) [syn: Willem
2: an organism (person or animal) that sits [ant: stander]
3: a person engaged to care for children when the parents are
not home [syn: babysitter, baby-sitter]
4: a person who poses for a painter or sculptor [syn: artist's
5: a domestic hen ready to brood [syn: brood hen, broody, broody
hen, setting hen]