Main Entry: ex·pec·to·rate Pronunciation: -t&-"rAt Function: verb Inflected Forms: -rat·ed; -rat·ing transitive senses 1: to eject from the throat or lungs by coughing or hawking and spitting 2:SPITexpectorateintransitive senses 1: to discharge matter from the throat or lungs by coughing or hawking and spitting 2:SPIT