Functional, working / (euphemistic, of a person) Mentally disabled but still able to survive in wider society.

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

plural of functioning

In a functional manner.

present participle of functionate

plural of functionalism

(mathematics) Any function whose values remain bounded by some constant.