Oxford Dictionary English onstage adjectiveadjective BrE BrE//ˌɒnˈsteɪdʒ// ; NAmE NAmE//ˌɑːnˈsteɪdʒ// , NAmE//ˌɔːnˈsteɪdʒ// In the theatre Add to my wordlistjump to other resultson the stage in a theatre; in front of an audience onstage fights See related entries: In the theatreSee onstage in the Oxford Advanced American DictionaryCheck pronunciation: onstage oxfordlearnersdictionaries.com