alertletter
nounUK /əˈlɜːtˌlɛtə/
US /əˈlɝːtˌlɛtɚ/
A letter that tells you something important you need to know right away.
The school sent an alertletter to parents about the snow day.
RELATED WORDS
OTHER MEANINGS
2. A short written message that warns people about danger.
The coast guard dropped an alertletter about the coming storm.
3. A letter used in a system to signal that action is needed.
Each alertletter in the file was marked with a red stamp.
4. A formal note sent to remind someone of an urgent task.
He received an alertletter about his overdue library books.