mass noun
1- tiny drops of water that form on cool surfaces at night, when atmospheric vapour condenses露, 露滴, 露水：
the grass was wet with dew
草地被露水打湿了
in sing. a cold, heavy dew dripped from the leaves.一滴滴冰冷、沉重的露珠从树叶上滚落。
1.1
- in sing. a beaded or glistening liquid resembling such drops（似露珠的）小水珠：
her body had broken out in a fine dew of perspiration.
她身上已经布满了细细的汗珠。
with obj.
- wet (a part of someone's body) with a beaded or glistening liquid用水珠弄湿（身体的一部分）：
sweat dewed her lashes.
汗水沾湿了她的睫毛。
词源
Old English dēaw, of Germanic origin; related to Dutch dauw and German Tau (noun)， tauen (verb).