v.1. To say or ask something rapidly, especially a question or command: The prosecutor fired questions off to the witness. My parents fired off reasons why my plan wouldn't work.
2. To write and send a communication quickly: I fired off a positive reply to the job offer. My friend fired an angry letter off to the editor.
3. To shoot something from a weapon, especially in quick succession: The police officer fired off warning shots when the suspect approached them. At the parade, the color guard fired three shots off.