Emily Dickinson Lexicon

UN-BE-LIEF', n. [Sax. ungeleafa.]

1. Incredulity; the withholding of belief; as, unbelief is blind. Milton.
2. Infidelity; disbelief of divine revelation. Hooker.
3. In the New Testament, disbelief of the truth of the Gospel, rejection of Christ as the Savior of men, and of the doctrines he taught; distrust of God's promises and faithfulness, &c. Matth. xiii. Mark xvi. Heb. iii. Rom. iv.
4. Weak faith. Mark ix.