appendage Play /əˈpɛndɪdʒ/noun(often with negative or pejorative connotations) a thing that is added or attached to something larger or more important.they treat Scotland as a mere appendage of Englandaddition,attachment,adjunct,addendum,appurtenance,accessory,accompaniment,affix,extra,add-on,supplement,accretion,peripheral SYNONYMS accessoryaccompanimentaccretionadd-onaddendumadditionadjunctaffixappurtenanceattachmentextraperipheralsupplement