( BrE ) ( NAmE thumb·tack , tack ) noun
a short pin with a large round flat head, used especially for fastening paper to a board or wall
( BrE ) ( NAmE thumb·tack , tack ) noun
a short pin with a large round flat head, used especially for fastening paper to a board or wall
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005