transitive verb Date: 14th century to insert in a document or text, 2. to insert (a name not listed on a ballot or voting machine) in an appropriate space, to cast (a vote) in this manner
WRITE IN
Meaning of WRITE IN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012