send in

present singular third person sends in · participle present sending in · participle past sent in · past sent in

1. historicalTo give (one's name), present (one's card) when making a social call.
2. To cause (something) to be delivered, especially by post/mail.
3. To send (someone) into the thick of things, as

   send in the clowns

   1 more example

   send in the cavalry

4. To send (someone) into the thick of things, as:
   1. To send (troops) into battle.
   2. ball gamesTo send (a batsman) onto the field to bat.