noun
- A square sail set on the crossjack yard of a ship, located on the mizzenmast.
Usage: nautical; also called 'crojack' or 'mizzen course'
Examples
- The sailors adjusted the crossjack to catch more wind.
- In heavy weather, the captain ordered the crossjack to be furled.
- The crossjack yard extends perpendicular to the mizzenmast.
- Experienced sailors knew how to trim the crossjack for optimal speed.