'sibling' definitions:

Definition of 'sibling'

From: WordNet
noun
A person's brother or sister [syn: sibling, sib]

Definition of 'sibling'

From: GCIDE

Definition of 'sibling'

From: GCIDE
  • sibling \sib"ling\ (s[i^]b"l[i^]ng), a. of or pertaining to a sibling, n.; as, sibling rivalry: the common rivalry between siblings. [PJC]

Synonyms of 'sibling'

From: Moby Thesaurus