A constant in the equation of a curve that can be varied to yield a family of similar curves

Any factor that defines a system and determines (or limits) its performance

(computer science) a reference or value that is passed to a function, procedure, subroutine, command, or program

A quantity (such as the mean or variance) that characterizes a statistical population and that can be estimated by calculations from sample data

Computer architecture in which processors are connected in a manner suggestive of connections between neurons; can learn by trial and error

Principles and parameters is a framework within generative linguistics in which the syntax of a natural language is described in accordance with general principles and specific parameters that for particular languages are either turned on or off. For example, the position of heads in phrases is determined by a parameter.

母数（ぼすう、 英語: parameter（パラメタ））は確率論および統計学において、確率分布を特徴付ける定数を指す。

In matematica, il parametro è una costante arbitraria richiamata in sistemi, formule, equazioni che può assumere tutti i valori in un determinato ambito.