cloud over(redirected from clouding over)
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1. To become overcast, as of the sky. Enjoy this sunshine while it lasts because the sky is supposed to cloud over this afternoon.
2. To become difficult to see through or opaque. I wouldn't try to put makeup on in the bathroom just yet—the mirror is still clouded over from when I showered.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. Lit. [for the sky] to fill with clouds; [for the sun] to be obscured by clouds. It was beginning to cloud over, so we went inside. The sky clouded over and it began to get chilly.
2. Fig. [for something once clear] to become opaque; to become clouded. My vision seemed to cloud over, and I could see very little. The mirror clouded over as the steam rose from the hot water in the sink.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Also, cloud up.
1. Become overcast with clouds, as in It's clouding over now, so it may rain soon, or It was too hot and sunny, but after a while the sky clouded up and we ventured outside. [Mid-1700s]
2. Become opaque, misty, or dim, as in I'm sweating so much that my eyeglasses are clouded over.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.