1 An activity that is natural to or the purpose of a person or thing.
1.1 mass noun Practical use or purpose in design.
1.2 A basic task of a computer, especially one that corresponds to a single instruction from the user.
A relation or expression involving one or more variables.
2.1 A variable quantity regarded in relation to one or more other variables in terms of which it may be expressed or on which its value depends.
2.2 Chemistry – A functional group.
3 A thing dependent on another factor or factors.
4 A large or formal social event or ceremony.
1 Work or operate in a proper or particular way.
1.1 function asFulfil the purpose or task of (a specified thing)
Mid 16th century from French fonction, from Latin functio(n-), from fungi ‘perform’.
I have no real compunctions
When talking of bodily functions,
But often get great satisfaction
By watching for your reaction!