I. noun Date: 1884 a tack with a broad flat head for pressing into a surface with the thumb, II. transitive verb Date: 1914 to fasten with a ~
THUMBTACK
Meaning of THUMBTACK in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012