Antonym: brother. Similar words: consistent, consistently, minister, sinister, register, administer, boisterous, resist. Meaning: ['sɪstə(r)] 
n. 1. a female person who has the same parents as another person 2. (Roman Catholic Church) a title given to a nun (and used as a form of address) 3. a female person who is a fellow member of a sorority or labor union or other group 4. (slang) sometimes used as a term of address for attractive young women.
n. 1. a female person who has the same parents as another person 2. (Roman Catholic Church) a title given to a nun (and used as a form of address) 3. a female person who is a fellow member of a sorority or labor union or other group 4. (slang) sometimes used as a term of address for attractive young women. 181. My sister occupies an important position in the Department of the Environment.
More similar words: consistent, consistently, minister, sinister, register, administer, boisterous, resist, subsist, insist, persist, assist, consist, assist in, consist of, consist in, assistant, assistance, resistance, listen, distend, listen to, listener, enlisted, oyster, poster, foster, glistening, mystery, cluster.