noun fei??joa \f??-??y??-??, -??h??-??\Definition of FEIJOA : the green round or oval juicy fruit of a shrub or small tree (Feijoa sellowiana) of the myrtle family that is native to South America and is grown commercially especially in New Zealand; also : the tree or shrub Origin of FEIJOANew Latin, genus name, from Jo??o da Silva Feij?? ???1824 Brazilian naturalistFirst Known Use: 1898