Longman Dictionary of Contemporary English homepage

Language: Old English
Origin: sibb 'related'

sibling

 noun
     
Related topics: Biology, Family
sib‧ling [countable]
1 formalSSF a brother or sister:
Most young smokers are influenced by their friends' and older siblings' smoking habits.
2

sibling rivalry

MP competition between brothers and sisters for their parents' attention or love
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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