A straight line or plane that touches a curve or curved surface at a point, but if extended does not cross it at that point.
The mathematician drew a tangent to the circle to illustrate the concept.
A completely different line of thought or action.
During the meeting, he went off on a tangent about his vacation plans.
The trigonometric function that for an angle in a right-angled triangle is the ratio of the length of the side opposite the angle to the length of the adjacent side; the function tan.
To determine the slope, she calculated the tangent of the measured angle.
A small metal blade or wooden rod on a clavichord key that strikes a string to produce sound and determine its pitch.
The technician replaced several worn tangents to restore the clavichord’s tone.
tangentadjective
Touching at a single point or along a line; not intersecting.
The tangent line barely touched the curve at one point without crossing it.
Diverging from an original purpose or course; irrelevant.
His tangent remarks during the meeting confused everyone about the main topic.