noun

• (uncountable) Any moisture from the atmosphere condensed by cool bodies upon their surfaces.
• (uncountable) Moisture in the air that settles on plants, etc in the morning or evening, resulting in drops.
  "And Gideon said vnto God, If thou wilt saue Israel by mine hand, as thou hast said, Beholde, I will put a fleece of wooll in the floore: and if the deaw be on the fleece onely, and it bee drie vpon all the earth beside, then shall I know that thou wilt saue Israel by my hande, as thou hast said. And it was so: for he rose vp early on the morrow, and thrust the fleece together, and wringed the deaw out of the fleece, a bowle full of water. And Gideon said vnto God, Let not thine anger be hote against me, and I will speake but this once: Let mee prooue, I pray thee, but this once with the fleece. Let it now be drie onely vpon the fleece, and vpon all the ground let there be deaw. And God did so that night: for it was drie vpon the fleece onely, and there was deaw on all the ground."
• (countable, but see usage notes) An instance of such moisture settling on plants, etc.
  "There was a heavy dew this morning."
• (figurative) Anything that falls lightly and in a refreshing manner.
  "the golden dew of sleep"

verb

• (transitive) To wet with, or as if with, dew; to moisten.
  "The grasses grew / A little ranker since they dewed them so."
• (intransitive) To deposit dew.
  "The former [substances extremely attentuated, or in a filamentous and downly state] collect dew copiously, while the latter [solids] so rarely indicate its presence, even when it is dewing freely on contiguous substances, that some observers have doubted whether it ever happened, and have been disposed to believe that they repel it."

noun

• (nuclear warfare) Acronym of Distant Early Warning.