secund Syllabification: (se·cund)Pronunciation: /ˈsēˌkənd, siˈkənd/Definition of secund adjective Botany arranged on one side only (such as the flowers of lily of the valley). Derivatives secundly adverb Origin: late 18th century: from Latin secundus (see second1)secund in other Oxford dictionaries Definition of secund in the British & World English dictionary