write in

US /raɪt ɪn/
UK /raɪt ɪn/
"write in" picture
1.

to include someone or something in a list or document by writing their name or details

:
Please write in your full name and address on the form.
The committee decided to write in an additional clause to the contract.
2.

to vote for a candidate whose name does not appear on the ballot by writing it in

:
Many voters chose to write in their preferred candidate.
It's rare for a write-in candidate to win an election.
3.

to send a letter or email to a newspaper, magazine, or television/radio program

:
Viewers are encouraged to write in with their opinions.
She decided to write in to the local newspaper about the issue.