Meaning of SITTER in English

SITTER

■ noun

1》 a person who sits, especially for a portrait or examination.

↘a sitting hen.

2》 [usu. in combination ] a person who looks after children, pets, or a house while the parents or owners are out or away: a house-~.

↘a person who provides care and companionship for people who are ill.

3》 Brit. informal (in sport) an easy catch or shot.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.