What does gradient mean?
A gradient is a change that occurs at a particular rate or direction. In geography and everyday description, it means a slope, such as a steep gradient on a road or hill. In mathematics and physics, a gradient represents how quickly a quantity changes, often with respect to another variable, and may also indicate the direction of that change. Designers use gradient to describe a gradual transition between colours, brightnesses, or other visual qualities, as in a sunset gradient. As an adjective, gradient occurs in specialised expressions such as gradient descent, a method used in optimisation and machine learning. The word is most useful when one wants to convey not merely that something changes, but how it changes: steadily, rapidly, sharply, or in a particular direction.
A slope, rate of change, direction of change, or gradual transition in colour, tone, or another quality.
"The gradient of the track increases sharply near the summit."
In mathematics, a gradient is the vector of partial derivatives of a function; in general use, it commonly means a slope or visual colour transition.
Characterized by gradual variation or forming a gradient.
"The optimisation method uses gradient descent to reduce the error."
This use is common in technical and scientific contexts.
The standard plural is “gradients.”
"Several gradients are used to create the background."
The word gradient comes from the Latin word for “step,” so even its mathematical sense is built around the idea of change by degrees.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does gradient come from?
The word comes through French from Latin, where gradere meant “to step” and gradus meant “step” or “degree.” The English word developed in the early 17th century in senses connected with gradation and a gradual progression, before being extended to mathematics and other technical uses. Its relatives include gradual, degree, progress, and regress, all reflecting the same Latin root.
Related word forms
How gradient is actually used
The word is neutral in register and standard in both British and American English. In mathematics and computing, it commonly denotes a rate or direction of change; in visual design, it usually describes a transition between colours or tones.
Easily confused with gradient
Gradual means progressing in stages, whereas a gradient is the rate, direction, or slope of that change.