Also found in: Thesaurus, Idioms.
adj. shad·i·er, shad·i·est
1. Full of shade; shaded: found a cool, shady spot under some trees. See Synonyms at dark.
2. Casting shade: a large, shady elm.
3. Of dubious character, morality, or legality; questionable: "men who could indulge in any shady deal in downtown offices and still pose as beneficent angels ... on the golf course" (Louis Auchincloss).
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.