• WordNet 3.6
    • v overcloud make obscure or unclear "The distinction was obscured"
    • v overcloud become covered with clouds "The sky clouded over"
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Webster's Revised Unabridged Dictionary
    • v. t Overcloud To cover or overspread with clouds; to becloud; to overcast.
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Century Dictionary and Cyclopedia
    • overcloud To cover or overspread with clouds; hence, to cover with gloom, depression, or sorrow.
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Chambers's Twentieth Century Dictionary
    • v.t Overcloud ō-vėr-klowd′ to cover over with clouds: to cause gloom or sorrow to.
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In literature:

The countenance of the Emperor was overclouded for a moment.
"Aurelian" by William Ware
The overclouded heaven threatened rain.
"The Life of Friedrich Schiller" by Thomas Carlyle
This rich dish is somewhat overclouded by his suggestion that the eels be arranged in a wreath.
"Customs and Fashions in Old New England" by Alice Morse Earle
For a moment his popularity was overclouded.
"The Political History of England - Vol. X." by William Hunt
Luckily the evening was overclouded and the shadows protecting.
"Skippy Bedelle" by Owen Johnson
As Gorringe seemed to be the only one who had observed the overclouding of the sky, so she seemed to be the only one to think it mattered much.
"The Convert" by Elizabeth Robins
Already the shadow of a violent death overclouded those fine, weak features.
"Great Men and Famous Women. Vol. 3 of 8" by Various
The setting sun was overclouded, now; the air sharp; the grove uneasily quiet.
"The Trail of the Hawk" by Sinclair Lewis
The sky had been overclouded all day, and continued so as the sun went down.
"The Giraffe Hunters" by Mayne Reid
When she awoke, the horizon was overclouded, and it began to rain.
"Alonzo and Melissa" by Daniel Jackson, Jr.

In poetry:

It makes me deaf, and dumb, and blind,
And impotent and lame;
And overclouds, and fills my mind,
With folly, fear, and shame.
"A Sick Soul" by John Newton
Though solitude endured too long
Bids youthful joys too soon decay,
Makes mirth a stranger to my tongue
And overclouds my noon of day,
"The Consolation" by Anne Bronte
Though solitude, endured too long,
Bids youthful joys too soon decay,
Makes mirth a stranger to my tongue,
And overclouds my noon of day;
"Lines Written From Home" by Anne Bronte
Th' old cov'nant-place to works we give,
Or mingle grace with do and live;
We overcloud the gospel-charms,
And also break our working arms.
"The Believer's Principles : Chap. II." by Ralph Erskine
If such there be, O grief and shame to think
That sight of thee should overcloud their joy,
A new-born soul, just waiting on the brink
Of endless life, yet wrapt in earth's annoy!
"Third Sunday After Trinity" by John Keble