What is the meaning of Diameter?

Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.

The length of such a line.

The maximum distance between any two points in a metric space

The maximum eccentricity over all vertices in a graph.

a diameter

diameter (length of diametrical chord)

diameter (diametrical chord)

diameter.

a diameter

a diameter

diameter

Source: wiktionary.org