functional >> ˈfʌŋ(k)ʃ(ə)n(ə)l
Definition: [adjective] of or having a special activity, purpose, or task.
Example: a functional role
Definition: [adjective] designed to be practical and useful, rather than attractive.
Example: a small, functional bathroom
Definition: [adjective] in operation; working.
Example: the museum will be fully functional from the opening of the festival
Definition: [adjective] relating to a variable quantity whose value depends upon one or more other variables.
Example: using functional notation, we can write—where L is the transactions demand for money