Oxford Dictionary English red admiral nounnoun BrE BrE//ˌred ˈædmərəl// ; NAmE NAmE//ˌred ˈædmərəl// Invertebrates Add to my wordlistjump to other results a butterfly (= a flying insect with large brightly coloured wings) that has black wings with bright red marks on them See related entries: InvertebratesSee red admiral in the Oxford Advanced American DictionaryCheck pronunciation: red admiral oxfordlearnersdictionaries.com