In geometry:
A line that intersects a curve in at least 2 points.

In trigonometry:
In a right angle triangle, the secant of an angle is the length of the hypotenuse divided by the length of the adjacent side.


Most commonly the horizontal line above the repetend in a decimal.

Previously, it was used to indicate a group of terms in a mathematical expression. This has been replaced with parentheses.

Repetend: a repeated number or series of numbers; similarly, it is also means a repeated word or phrase.