mortarboard Definition
a hat with a flat, square top and a tassel, worn especially at graduation ceremonies.
Using mortarboard: Examples
Take a moment to familiarize yourself with how "mortarboard" can be used in various situations through the following examples!
Example
She looked very smart in her black gown and mortarboard.
Example
The graduates threw their mortarboards into the air in celebration.
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Summary: mortarboard in Brief
A 'mortarboard' [ˈmɔː.tə.bɔːd] is a hat with a flat, square top and a tassel, typically worn at graduation ceremonies. It is often paired with a graduation gown and thrown into the air in celebration.