half brother

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noun

Origin of half brother

Middle English word dating back to 1300–50
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British Dictionary definitions for half-brother

half-brother


noun

the son of either of one's parents by another partner
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012