Functionality vs. Performance

(uncountable) The ability to perform a task or function; that set of functions that something is able or equipped to perform.

In United States trademark law, the tendency of a product design to serve a function other than identification of the product, preventing that design from being protected as a trademark.

The presence of a functional group.

capable of serving a purpose well;

Example: ‘software with greater functionality’;

The act of performing; carrying into execution or action; execution; achievement; accomplishment; representation by action.

Example: ‘the performance of an undertaking or a duty’;

That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; especially, an action of an elaborate or public character.

(arts) A live show or concert.

The amount of useful work accomplished estimated in terms of time needed, resources used, etc.

Example: ‘Better performance means more work accomplished in shorter time and/or using fewer resources.’;

The act of performing; the carrying into execution or action; execution; achievement; accomplishment; representation by action; as, the performance of an undertaking of a duty.

Example: ‘Promises are not binding where the performance is impossible.’;

That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; esp., an action of an elaborate or public character.

a dramatic or musical entertainment;

Example: ‘they listened to ten different performances’; ‘the play ran for 100 performances’; ‘the frequent performances of the symphony testify to its popularity’;

the act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it;

Example: ‘they criticised his performance as mayor’; ‘experience generally improves performance’;

the act of presenting a play or a piece of music or other entertainment;

Example: ‘we congratulated him on his performance at the rehearsal’; ‘an inspired performance of Mozart's C minor concerto’;

process or manner of functioning or operating;

Example: ‘the power of its engine determine its operation’; ‘the plane's operation in high winds’; ‘they compared the cooking performance of each oven’; ‘the jet's performance conformed to high standards’;

any recognized accomplishment;

Example: ‘they admired his performance under stress’; ‘when Roger Maris powered four home runs in one game his performance merits awe’;

A performance is an act of staging or presenting a play, concert, or other form of entertainment. It is also defined as the action or process of carrying out or accomplishing an action, task, or function.