send off phrasal verb ( see also ↑ send )
1 . send something ↔ off to send something somewhere by post:
I sent off the letter this morning.
2 . send off for something to send a letter to a company or organization asking them to post something to you:
I sent off for a copy of the photograph.
3 . send somebody ↔ off British English to order a sports player to leave the field because they have broken the rules:
One of Dundee’s players was sent off for punching another player.