1.
A ~ gun is one that shoots a lot of bullets very quickly, one after the other.
In the back of the truck was a 12.7 millimeter ~ machine gun.
ADJ: ADJ n
2.
A ~ conversation or speech is one in which people talk or reply very quickly.
Yul listened to their sophisticated, ~ conversation.
ADJ: ADJ n
3.
A ~ economic activity or development is one that takes place very quickly. (mainly AM JOURNALISM)
...the ~ buying and selling of stocks...
ADJ: ADJ n