Moisten/ˈmɔɪsn/ Definition 1 of 2Pro Tip 1/3Slight Wetness Use 'moisten' to imply a light touch of wetness, not soaking wet. After peeling the stickers, he moistened the surface to remove the residue. Pro Tip 2/3Physical Sensation 'Moisten' can mean to make something feel slightly wet to the touch. She moistened the clay before shaping it. Pro Tip 3/3Neutral Tone 'Moisten' is neutral and can be used in formal and informal contexts. The nurse will moisten your arm with an antiseptic before the injection.