Definitions

1. noun

A unit of angular measurement, equal to the angle at the centre of a circle subtended by an arc equal in length to the radius of the circle.

“The satellite’s orbit was measured in radians, allowing scientists to calculate its precise trajectory.”

2. noun

A unit of measurement for solid angles, used in mathematics and physics.

“The astronomers used radians to calculate the total solid angle of the observed galaxy.”

3. noun

A measure of the amount of rotation or revolution, often used in mechanical systems.

“The engineer calculated the radian measure of the gearbox’s rotation speed.”