thumb ‧ tack /ˈθʌmtæk/ BrE AmE noun [countable]
American English a short pin with a flat top that is used for fixing notices on walls SYN drawing pin British English
thumb ‧ tack /ˈθʌmtæk/ BrE AmE noun [countable]
American English a short pin with a flat top that is used for fixing notices on walls SYN drawing pin British English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012