Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014 o•vum (ˈoʊ vəm) n.,pl.o•va(ˈoʊ və) the female reproductive cell, developed in the ovary; female gamet...