infidelity

[ in-fi-del-i-tee ]
/ ˌɪn fɪˈdɛl ɪ ti /

noun, plural in·fi·del·i·ties.

marital disloyalty; adultery.
unfaithfulness; disloyalty.
lack of religious faith, especially Christian faith.
a breach of trust or a disloyal act; transgression.

Origin of infidelity

1375–1425; late Middle English < Latin infidēlitās, equivalent to infidēli(s) unfaithful (see infidel) + -tās -ty2

Example sentences from the Web for infidelity

British Dictionary definitions for infidelity

infidelity
/ (ˌɪnfɪˈdɛlɪtɪ) /

noun plural -ties

lack of faith or constancy, esp sexual faithfulness
lack of religious faith; disbelief
an act or instance of disloyalty