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1. To become covered in condensation. The windows misted over in the early hours of the cold morning.
2. To cause something to become covered in condensation. In this usage, a noun or pronoun can be used between The warm air of the shop misted my glasses over as I stepped in from the cold.
3. To fill with tears. (Said of one's eyes.) I'll never forget the way my grandfather's eyes would mist over whenever we got in the car to drive back home at the end of each summer.
mist overand mist up
[for glass] to fog up; [for glass] to develop a coating of water vapor so that one cannot see. The windshield misted over and we could hardly see out. The glass misted up and we had to wipe it off.
mist overor mist up
1. To cover something with fine droplets of water or some other misty substance: The sprinkler automatically mists over the plants in the greenhouse every day. The humid air misted the mirrors up.
2. To become covered with fine droplets of water or some other misty substance; fog up: The cold windshield misted over with our moist breath. I turned on the blower because the car windows had misted up.
3. To become full of tears: As they sang the old songs, my eyes misted over. I mist up whenever I think of home.