v.1. To start to ask questions or talk. Often used as a command: I know you have questions, so fire away. As soon as the candidate finished his speech, the pundits fired away with their commentaries.
2. To begin to shoot with a weapon: The troops landed on the beach and started firing away. I fired away at the burglar as he ran from the house.
3. To use up something by shooting it from a weapon: The recruits fired away all of the ammunition during practice. We fired the last bullets away at the range.