noun
- the principal sail on the mainmast of a sailing vessel
Usage: nautical
Examples
- The crew hoisted the mainsail as they prepared to leave the harbor.
- A strong gust of wind filled the mainsail and propelled the yacht forward.
- The captain ordered the sailors to reef the mainsail during the storm.
- The mainsail was torn and needed repair before the next voyage.
- She learned to trim the mainsail properly during sailing lessons.
- The boat’s mainsail caught the wind beautifully on that sunny afternoon.