Sep 6, 2025 dew ˈdü 1 syllable uncommon ‹ noun. moisture condensed upon the surfaces of cool bodies especially at night wet with morning dew… the golden dew of sleep … noun. something resembling dew in purity, freshness, or power to refresh noun. moisture especially when appearing in minute droplets: such as › Origin Middle English, from Old English dēaw; akin to Old High German tou dew, Greek thein to run.