Definition, Meaning & Synonyms

diameter

noun
/daɪˈæmətər/
Definition
The distance across a circle through its center.
Examples
  • The diameter of the Earth is about 12,742 kilometers.
  • To find the area of a circle, you need to know the diameter.
  • The wheel has a diameter of 20 inches.
Meaning
Diameter refers to a straight line that passes through the center of a circle and connects two points on its perimeter. It also represents the length of that line.
Synonyms
  • width
  • breadth
  • extent