-ia1 Syllabification: (-ia)Definition of -ia suffix 1forming nouns adopted unchanged from Latin or Greek (such as mania, militia), and modern Latin or Greek terms (such as utopia). 2forming names of. Medicine states and disorders:anemia diphtheria Botany & Zoology genera and higher groups:dahlia Latimeria 3forming names of countries:IndiaOrigin:representing Latin or Greek endings-ia in other Oxford dictionaries Definition of -ia in the British & World English dictionary