Most simply a synonym for honesty. But integrity is frequently connected with the more complicated notion of a wholeness or harmony of the self, associated with a proper conception of oneself as someone whose life would lose its unity, or be violated by doing various things. It has been argued, notably by Williams, that utilitarianism can make no sense of the range of thoughts this properly engenders, although others have claimed that the aim of living life as a good utilitarian provides its own standards of integrity.
Philosophy dictionary. Academic. 2011.