dotted line

UK: /ˌdɒtɪdˈlaɪn/

WordReference Random House Unabridged Dictionary of American English © 2026

dot′ted line′, 

1. a line on a contract or similar document for a party's signature.
2. a line at which a sheet of paper is perforated or a piece of it is to be detached.
3. Idioms signature on the dotted line, full agreement to terms and conditions.
4. Idioms sign on the dotted line, to agree fully to terms or conditions.
• 1770–75