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Definition of: unfaithful
(un·fāth′fəl) adjective
1. Manifesting lack or absence of faith; unworthy of trust; perfidious; faithless; not true to marriage vows: an unfaithful husband.
2. Not true to a standard or to an original; not accurate or exact: an unfaithful description.
3. Obs. Not having religious faith; unbelieving; infidel. See synonyms under PERFIDIOUS.
—un·faith′·ful·ly adverb
—un·faith′ful·ness noun
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