additional Play /əˈdɪʃ(ə)n(ə)l/adjectiveAdded, extra, or supplementary to what is already present or available.we require additional informationextra,added,supplementary,supplemental,further,auxiliary,ancillary,subsidiary,secondary,attendant,accessory SYNONYMS accessoryaddedancillaryattendantauxiliaryextrafurthersecondarysubsidiarysupplementalsupplementary