By utility is meant that property in any object whereby it tends to produce benefit, advantage, pleasure, good, or happiness (all this in the present case comes to the same thing), or (what comes again to the same thing) to prevent the happening of mischief, pain, evil, or unhappiness to the party whose interest is considered:  if that party be the community in general, then the happiness of the community; if a particular individual, then the happiness of that individual.

The interest of the community is one of the most general expressions that can occur in the phraseology of morals:  no wonder that the meaning of it is often lost.  When it has a meaning, it is this:  The community is a fictitious body, composed of the individual persons who are considered as constituting, as it were, its members.  The interest of the community, then, is what?  The sum of the interests of the several members who compose it.

It is vain to talk of the interest of the community, without understanding what is the interest of the individual.  A thing is said to promote the interest, or to be for the interest, of an individual, when it tends to add to the sum total of his pleasures:  or, what comes to the same thing, to diminish the sum total of his pains.

An action, then, may be said to be conformable to the principle of utility, or for shortness’ sake to utility (meaning with respect to the community at large), when the tendency it has to augment the happiness of the community is greater than any it has to diminish it.

A measure of government (which is but a particular kind of action, performed by a particular person or persons) may be said to be conformable to or dictated by the principle of utility, when in like manner the tendency which it has to augment the happiness of the community is greater than any which it has to diminish it.

When an action, or in particular a measure of government, is supposed by a man to be conformable to the principle of utility, it may be convenient for the purposes of discourse to imagine a kind of law or dictate called a law or dictate of utility, and to speak of the action in question as being conformable to such law or dictate.

A man may be said to be a partisan of the principle of utility, when the approbation or disapprobation he annexes to any action, or to any measure, is determined by and proportioned to the tendency which he conceives it to have to augment or to diminish the happiness of the community; or in other words, to its conformity or unconformity to the laws or dictates of utility.

Of an action that is conformable to the principle of utility, one may always say either that it is one that ought to be done, or at least that it is not one that ought not to be done.  One may say also that it is right it should be done, at least that it is not wrong it should be done; that it is a right action, at least that it is not a wrong action.  When thus interpreted, the words ought, and right and wrong, and others of that stamp, have a meaning; when otherwise, they have none.