Cloud \Cloud\, v. t. [imp. & p. p. Clouded; p. pr. & vb. n. Clouding.]

1. To overspread or hide with a cloud or clouds; as, the sky is clouded.

2. To darken or obscure, as if by hiding or enveloping with a cloud; hence, to render gloomy or sullen.

One day too late, I fear me, noble lord, Hath clouded all thy happy days on earth. --Shak.

Be not disheartened, then, nor cloud those looks. --Milton.

Nothing clouds men's minds and impairs their honesty like prejudice. --M. Arnold.

3. To blacken; to sully; to stain; to tarnish; to damage; -- esp. used of reputation or character.

I would not be a stander-by to hear My sovereign mistress clouded so, without My present vengeance taken. --Shak.

4. To mark with, or darken in, veins or sports; to variegate with colors; as, to cloud yarn.

And the nice conduct of a clouded cane. --Pope.

Source: Webster's Revised Unabridged Dictionary (1913)