dome

B2 · Upper Intermediate Countable noun

n. any object or cover that is shaped like an upside-down bowl.

n. any object or covering characterized by a convex, hemispherical shape.

“The waiter lifted the silver dome to reveal the main course.”

“A protective plastic dome was placed over the delicate scientific equipment to prevent dust contamination during the construction phase.”

C2 · Proficiency Countable noun Science Technical

n. a rounded hill or rock shape formed by pressure from underground.

n. a rounded geological feature consisting of symmetrical anticlines that intersect at their highest point.

“The salt dome underground created a perfect trap for oil and gas.”

“Geologists identified a significant granite dome that had been exposed by millions of years of wind and water erosion.”

C1 · Advanced Countable noun Informal · Slang

n. a person's head.

n. a person's head, often used when referring to a bald head or a large forehead.

“He wore a warm hat to protect his bald dome from the winter cold.”

“The comedian made several self-deprecating jokes about his shiny dome reflecting the stage lights.”

C2 · Proficiency Technical

v. to make something into a rounded, ball-like shape.

v. to give a hemispherical or convex shape to a surface or object.

“The heat caused the plastic to dome slightly in the center.”

“The metal was carefully domed using a hydraulic press to ensure the structural integrity of the pressure vessel.”