0 half-brother [noun]a brother who is the son of only one of your parents US /ˈhæfˌbrʌð.ɚ/ UK /ˈhɑːfˌbrʌð.ər/ Longman Dictionary of Contemporary English half-brother ˈhalf-ˌbrother BrE AmE noun [countable] a brother who is the son of only one of your parents ⇨ half-sister Oxford Advanced Learner's Dictionary half-brother ˈhalf-brother [half-brother half-brothers] noun a person's half-brother is a boy or man with either the same mother or the same father as they have compare stepbrother Cambridge Advanced Learner's Dictionary ˈ half- ˌ brother / ˈhɑːfˌbrʌð.ə r / / ˈhæfˌbrʌð.ɚ / noun [ C ] a brother who is the son of only one of your parents Collins Advanced Learner’s English Dictionary half-brother half-brothers N-COUNT Someone's half-brother is a boy or man who has either the same mother or the same father as they have. Merriam-Webster's Advanced Learner's Dictionary half brother half brother noun, pl ~ -ers [count] : a brother with the same father but a different mother or the same mother but a different father • George is my half brother. American EnglishBritish Englishnon-blood relationsB2 (Upper-intermediate)nounShortened URL: http://lngt.co/half-brother1en