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  1. FUNCTION Definition & Meaning - Merriam-Webster

    function, office, duty, province mean the acts or operations expected of a person or thing. function implies a definite end or purpose or a particular kind of work.

  2. What is a Function - Math is Fun

    What is a Function? A function relates an input to an output. It is like a machine that has an input and an output. And the output is related somehow to the input. " f (x) = ... " is the classic way of writing a …

  3. Function (mathematics) - Wikipedia

    The concept of a function was formalized at the end of the 19th century in terms of set theory, and this greatly increased the possible applications of the concept. A function is often denoted by a letter …

  4. Introduction to Function - GeeksforGeeks

    Oct 6, 2025 · We can define a function in mathematics as a machine that takes some input and gives a unique output.

  5. FUNCTION | English meaning - Cambridge Dictionary

    FUNCTION definition: 1. the natural purpose (of something) or the duty (of a person): 2. an official ceremony or a…. Learn more.

  6. Function - definition of function by The Free Dictionary

    1. the natural action or intended purpose of a person or thing in a specific role: the function of a hammer is to hit nails into wood.

  7. Function -- from Wolfram MathWorld

    Jan 20, 2026 · A function is a relation that uniquely associates members of one set with members of another set. More formally, a function from A to B is an object f such that every a in A is uniquely …

  8. Function: Definition, types of functions, and applications!

    In other words, a function is a relationship between two sets that assigns a unique output value to each input value. Read on to explore the main types of functions, their key properties, and their practical …

  9. 3.1 What Are Functions? - MIT Mathematics

    The simplest definition is: a function is a bunch of ordered pairs of things (in our case the things will be numbers, but they can be otherwise), with the property that the first members of the pairs are all …

  10. What Are Functions in Math?- Cuemath

    Functions define the relationship between two variables, one is dependent and the other is independent. Function in math is a relation f from a set A (the domain of the function) to another set B (the co …