marginate Syllabification: (mar·gin·ate) BiologyDefinition of marginate verb Pronunciation: /ˈmärjəˌnāt/ [with object] provide with a margin or border; form a border to. adjective Pronunciation: /-nit, ˌnāt/ having a distinct margin or border. Derivatives marginationPronunciation: /ˌmärjəˈnāSHən/ noun marginate in other Oxford dictionaries Definition of marginate in the British & World English dictionary