mortarboard

/ˈmɔrtərˌbɔrd/
noun
  1. A flat, square cap worn by students and teachers at graduation ceremonies.
    • All the graduates wore black mortarboards and gowns at the ceremony.
    • The tassel on the mortarboard is moved from right to left after receiving the diploma.
    • She tossed her mortarboard into the air to celebrate finishing college.
  2. A flat board used by masons to hold mortar while working.
    • The bricklayer carried a mortarboard loaded with fresh cement.
    • He set the mortarboard on a stand so he could easily reach it.
    • A mortarboard keeps the mortar from drying out too quickly.
Synonyms
What does "mortarboard" mean? | whatsthatwordmean | whatsthatwordmean