a person's brother or sister (as modifier): sibling rivalry any fellow member of a sib
WordReference Random House Learner's Dictionary of American English © 2026
WordReference Random House Unabridged Dictionary of American English © 2026
sib•ling
(sib′ling),USA pronunciation n.
adj.
- a brother or sister.
- Anthropologya comember of a sib.
adj.
- of or pertaining to a brother or sister:sibling rivalry.
- bef. 1000; late Middle English: relative, Old English; see sib, -ling1
Collins Concise English Dictionary © HarperCollins Publishers::
'sibling' also found in these entries (note: many are not synonyms or translations):
Kaddish
- Yahrzeit
- brother
- brother-in-law
- cockatoo
- half-sibling
- inclusive fitness
- only
- shivah
- sib
- sister
- sister-in-law