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definitions
  • synonyms

half-

prefix
  1. one of two equal partshalf-moon
  2. related by one parent onlyhalf-sister
  3. not completely; partlyhalf-hardy
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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

Word Origin and History for half-

"sharing one parent," from half. Half-brother is attested from early 14c.; half-sister from c.1200.

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Online Etymology Dictionary, © 2010 Douglas Harper