idempotence UK /ˌɪdɛmˈpəʊtəns/US /ˈaɪdəmˌpoʊtəns/ noun1 •A quality of an action such that repetitions of the action have no further effect on the outcome; the state of being idempotent.The proof (Tables 9 and 10) of idempotence for both OR and AND follows from examining the definition of each operation under the constraint that both inputs have the same value. — 2022