noun
- A square sail set on the crossjack yard of a ship, located on the mizzenmast.
Usage: nautical; plural of crossjack
Examples
- The sailors adjusted the crossjacks to catch more wind.
- In heavy weather, the captain ordered the crossjacks to be furled.
- The crossjacks on the mizzenmast helped balance the ship's sail plan.
- Modern ships rarely use crossjacks in their rigging systems.