Webster's Revised Unabridged Dictionary · 1913

Shady

Shady , adjective

1.
Abounding in shade or shades; overspread with shade; causing shade.
The shady trees cover him with their shadow. — Job. xl. 22
And Amaryllis fills the shady groves. — Dryden
2.
Sheltered from the glare of light or sultry heat.
Cast it also that you may have rooms shady for summer and warm for winter. — Bacon
3.
Of or pertaining to shade or darkness;
unfit to be seen or known; of questionable character; unsavory; equivocal; dubious, corrupt, or criminal; as, a shady character; -- of people or activities. [Colloquial]
A shady business. — London Sat. Rev
Shady characters, disreputable, criminal. — London Spectator
Collocations (2)
On the shady side of , on the thither side of; as, on the shady side of fifty; that is, more than fifty. [Colloquial]
To keep shady , to stay in concealment; also, to be reticent. [Slang]