functional

The word “functional” means working properly; in usable, operating condition. In plain terms, working, or built to be practical and useful rather than decorative.

“Functional” is pronounced FUHNGKT-shuh-nuhl (/ˈfʌŋkt͡ʃənəl/ in IPA).

Here is “functional” used in a sentence: “The old radio is still functional after fifty years.”

Words with a similar meaning to “functional” include functioning, working, utilitarian, in working order, operational and running like a top.

The opposite of “functional” — its antonyms — are dysfunctional, non-functional, nonfunctional, unfunctional and organic.

“Functional” is an adjective.

“Functional” is a fairly common word in modern English, usually learned at around the B2 level.

“Functional” has 2 distinct senses listed in this dictionary. The most common is: working properly; in usable, operating condition.

Both mean something is working, but "functional" stresses that a thing is in usable, working condition and can perform its purpose. "Operational" often stresses that a system or machine is actively up and running, especially in technical or military contexts.

"Functional" describes something designed for use rather than appearance, or something that simply works. "Practical" stresses being sensible, useful, and effective in real situations, so a design can be functional yet still be judged on how practical it is day to day.

They are opposites. "Functional" means working properly and able to perform its purpose, while "dysfunctional" means not working as it should, whether describing a machine, a system, or a relationship.

"Functioning" usually means currently working at this moment, as in "a functioning engine." "Functional" more broadly means designed to work or capable of working, and it can also mean built for practical use rather than looks.