In good working order. / Useful; serving a purpose, fulfilling a function / Only for functional purposes, notably in architecture

What something does or is used for. / A professional or official position. / An official or social occasion. / Something which is dependent on or stems from another thing; a result or concomitant.

plural of functionality

simple past tense and past participle of function

(logic, mathematics) A function that is equivalent to the NOT operator.

(architecture) A doctrine, in several fields, that the function of something should be reflected in its design and the materials used in its construction

In a functional manner.

present participle of functionate

simple past tense and past participle of functionate

Third-person singular simple present indicative form of functionate