filternounmasculine/ˈfiɫ.tɾu/highfil·troPortuguesEnglishEspanolFrancaisDefinitionA device that separates particles from a liquid or gas.The water filter needs to be replaced.He used a filter to purify the air.synseparatorpurifierEtymologyDo latim 'filtrum'Related wordsfiltrarfiltragemfiltrante