From Longman Dictionary of Contemporary Englishscoop neckˈscoop ˌneck (also scoop neckline) noun [countable] DCCa round, quite low neck on a woman’s top
Examples from the Corpus
scoop neck• The vest is simplicity itself, with a scoop neck front and back.• Add a lace top for a touch of glamour, scoop neck, long sleeved top, £24.99. 