(mathematics) An inverse hyperbolic function

(algebraic geometry) Informally, any function expressible using (only) the operations of addition, subtraction, multiplication, division and raising to a rational power; more precisely, any continuous function definable as the root of some polynomial equation.

(mathematics) an inverse trigonometric function

(mathematics) Any function whose value is zero except for a finite part of its argument for which it has a constant non-zero value

(mathematics) Either of a pair of functions that have the same domain and that the values of one are equal to or greater than the other for all points in that domain.

(trigonometry) Synonym of trigonometric function

(mathematics) A function whose value is the same for all the elements of its domain.

(mathematics) A function of one or more independent variables, at least one of which is itself a function of one or more other independent variables; a function of function(s).

(chemistry) The relationship between the acidity of a solution and the concentration of its solute.

(computing) Any function that is provided as part of a high-level language and can be executed by a simple reference with specification of arguments