Entry 3 senses · 2 variants Webster, 1913 Moist /moist/ · IPA /mɔɪst/ a. v. t. 01 a. Moderately wet; damp; humid; not dry; as, a moist atmosphere or air. 1. Moderately wet; damp; humid; not dry; as, a moist atmosphere or air. 2. Fresh, or new.[Obs.] 02 v. t. To moisten. 1. To moisten.[Obs.]