A Quint

1. (music) An interval of one fifth.
2. (music) The E string of a violin.
3. (card games) In piquet, a sequence of five playing cards of the same suit; equivalent to a straight flush in poker
4. (US, informal) a quin or quintuplet.
5. (firefighting) A vehicle used by firefighters that combines the capabilities of a fire engine and a fire truck, having the ability to provide vertical access as well as pump water to fight a fire.
6. (fencing) quinte; the fifth fencer in parrying or attacking position.