mortarboard
nounUK /ˈmɔːtəbɔːd/
US /ˈmɔːrtərbɔːrd/
A flat black cap with a square top that people wear when they finish school.
She threw her mortarboard in the air after graduation.
RELATED WORDS
OTHER MEANINGS
2. A small board with a handle used by builders to hold mortar.
The mason scooped mortar onto his mortarboard.
3. The square board used in the game of quoits or similar tossing games.
He tossed the ring toward the mortarboard.
4. A flat board used to carry bricks or mortar on a building site.
The worker balanced bricks on the mortarboard.