homonymic, homonymous 1. A word that is spelled or pronounced in the same way as one or more other words but has a different meaning. 2. Someone with the same name as another. 3. In biology, a taxonomic name that is the same as one already designating a different species or genus and cannot therefore be used. Found on http://www.wordinfo.info/words/index/info/view_unit/2565/5