Oxford Dictionary English astrophysics nounnoun BrE BrE//ˌæstrəʊˈfɪzɪks// ; NAmE NAmE//ˌæstroʊˈfɪzɪks// [uncountable] The universe Add to my wordlistjump to other resultsthe scientific study of the physical and chemical structure of the stars, planets, etc. See related entries: The universeSee astrophysics in the Oxford Advanced American DictionaryCheck pronunciation: astrophysics oxfordlearnersdictionaries.com
