1. A person's brother or sister
   "The sibs shared a strong bond despite their frequent arguments";
   - sibling
    
2. One related by blood or origin; especially on sharing an ancestor with another
   "She discovered a long-lost sib through genealogical research";
   - blood relation, blood relative, cognate

Derived forms: sibs

Type of: flesh and blood, relation, relative

Part of: family, family unit

Encyclopedia: Sib, Sistan and Baluchestan