/ 5sIblIN; `sIblIN/ n (fml 文) any one of two or more people with the same parents; brother or sister 兄弟姊妹: I have two brothers and a sister: three siblings in all. 我有两个哥哥和一个妹妹: 共有三个兄妹. * [attrib 作定语] sibling rivalry 同胞兄弟姊妹间的竞争.