'Sly' definitions:

Definition of 'sly'

From: WordNet
adjective
Marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dick"; "a wily old attorney" [syn: crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricksy, tricky, wily]

Definition of 'Sly'

From: GCIDE
  • Sly \Sly\, a. [Compar. Slieror Slyer; superl. Sliest or Slyest.] [OE. sli, slegh, sleih, Icel. sl?gr, for sl?gr; akin to Sw. slug, Dan. slu, LG. slou, G. schlau; probably to E. slay, v.t.; cf. G. verschlagen sly. See Slay, v. t., and cf. Sleight.]
  • 1. Dexterous in performing an action, so as to escape notice; nimble; skillful; cautious; shrewd; knowing; -- in a good sense. [1913 Webster]
  • Be ye sly as serpents, and simple as doves. --Wyclif (Matt. x. 16). [1913 Webster]
  • Whom graver age And long experience hath made wise and sly. --Fairfax. [1913 Webster]
  • 2. Artfully cunning; secretly mischievous; wily. [1913 Webster]
  • For my sly wiles and subtle craftiness, The litle of the kingdom I possess. --Spenser. [1913 Webster]
  • 3. Done with, and marked by, artful and dexterous secrecy; subtle; as, a sly trick. [1913 Webster]
  • Envy works in a sly and imperceptible manner. --I. Watts. [1913 Webster]
  • 4. Light or delicate; slight; thin. [Obs.] [1913 Webster]
  • By the sly, or On the sly, in a sly or secret manner. [Colloq.] "Gazed on Hetty's charms by the sly." --G. Eliot.
  • Sly goose (Zool.), the common sheldrake; -- so named from its craftiness. [1913 Webster]
  • Syn: Cunning; crafty; subtile; wily. See Cunning. [1913 Webster]

Definition of 'Sly'

From: GCIDE
  • Sly \Sly\, adv. Slyly. [Obs. or Poetic] --Spenser. [1913 Webster]