Source : Webster's Revised Unabridged Dictionary (1913)
Shady \Shad"y\, a. [Compar. {Shadier}; superl. {Shadiest}.]
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; hence, unfit to be
seen or known; equivocal; dubious or corrupt. [Colloq.]
``A shady business.'' --London Sat. Rev.
Shady characters, disreputable, criminal. --London
Spectator.
{On the shady side of}, on the thither side of; as, on the
shady side of fifty; that is, more than fifty. [Colloq.]
{To keep shady}, to stay in concealment; also, to be
reticent. [Slang]