ˈsɪstə n. 1 a
woman or
girl in
relation to sons
and other daughters of
her parents. 2 a (often as a
form of address) a close
female friend or
associate. b a female
fellow member of a
trade union,
class,
sect, or
the human race. 3 a
senior female
nurse. 4 a member of a female
religious order. 5 (attrib.) of the
same type or
design or
origin etc. (sister
ship;
prose, the younger sister of verse). øsister
german see GERMAN. sister-in-law (pl. sisters-in-law) 1 the sister of one's
wife or
husband. 2 the wife of one's
brother. 3 the wife of one's brother-in-law. Sister of
Mercy a member of an educational or
charitable order of
women,
esp.
that founded in Dublin in 1827. sister
uterine see UTERINE. øøsisterless adj. sisterly adj. sisterliness n. [ME sister (f. ON), suster etc. (repr. OE sweoster f. Gmc)]