definition of
sitter

[1] #1 sitter n. [Sitter, Willem de Sitter] Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934). wn

[2] #2 sitter n. an organism (person or animal) that sits. wn

[3] #3 sitter n. [babysitter, baby-sitter] a person engaged to care for children when the parents are not home. wn

[4] #4 sitter n. [artist's model] a person who poses for a painter or sculptor. wn

[5] #5 sitter n. [brood hen, broody, broody hen, setting hen] a domestic hen ready to brood. wn