1 on the sly | Definition of on the sly

sly

adjective
\ ˈslī How to pronounce sly (audio) \
slyer also slier\ ˈslÄ«(-​É™)r How to pronounce slier (audio) \; slyest also sliest\ ˈslÄ«-​É™st How to pronounce sliest (audio) \

Definition of sly

1 chiefly dialectal

a : wise in practical affairs
b : displaying cleverness : ingenious
2a : clever in concealing one's aims or ends : furtive
b : lacking in straightforwardness and candor : dissembling
3 : lightly mischievous : roguish a sly jest
on the sly
: in a manner intended to avoid notice

Keep scrolling for more

Other Words from sly

slyly or less commonly slily adverb
slyness noun

Choose the Right Synonym for sly

sly, cunning, crafty, wily, tricky, foxy, artful, slick mean attaining or seeking to attain one's ends by guileful or devious means. sly implies furtiveness, lack of candor, and skill in concealing one's aims and methods. a sly corporate raider cunning suggests the inventive use of sometimes limited intelligence in overreaching or circumventing. the cunning fox avoided the trap crafty implies cleverness and subtlety of method. a crafty lefthander wily implies skill and deception in maneuvering. the wily fugitive escaped the posse tricky is more likely to suggest shiftiness and unreliability than skill in deception and maneuvering. a tricky political operative foxy implies a shrewd and wary craftiness usually involving devious dealing. a foxy publicity man planting stories artful implies indirectness in dealing and often connotes sophistication or cleverness. elicited the information by artful questioning slick emphasizes smoothness and guile. slick operators selling time-sharing

Examples of sly in a Sentence

the movie pairs a sly, dissembling ex-con with an upstanding, straight-arrow cop why, you sly fellow! I had no idea you were planning my birthday party

Recent Examples on the Web

The book is narrated by David Aaron Baker, a Southerner himself and an accomplished actor whose calm, rueful delivery accords with the sly humor of this terrifically entertaining book. Katherine A. Powers, Washington Post, "Gore Vidal’s ‘Lincoln’ and other best audiobooks for summer’s end," 29 Aug. 2019 Peppa Pig's first album could have capitalized on her instant virality with this debut album, turning its sly British humor for kids into pop gold for everyone. Joshua Bote, USA TODAY, "Peppa Pig just dropped her new, long-awaited album. It's no 'Baby Shark'," 19 July 2019 Castrated at birth, the sly sashaying Salima exists in between the boundaries of gender. Karen D'souza, The Mercury News, "Review: Swashbuckling world premiere ‘House of Joy’ hits and misses at Cal Shakes," 19 Aug. 2019 Long known to have a sly sense of humor, Dr. Cohen published technical papers over the years with a mysterious, imaginary co-author, Professor J. Finnegan, of Oceanview University in Oceanview, Kan. Katie Hafner, New York Times, "Danny Cohen, Who Helped Set the Stage for a Digital Era, Dies at 81," 16 Aug. 2019 Ganambarr, an indigenous Australian dancer making his screen acting debut, won a prize at last year’s Venice International Film Festival for his sly, spirited performance, which reshapes the picture in ways both obvious and not. San Diego Union-Tribune, "Review: ‘The Nightingale’ is a brilliant, horrifying tale of revenge," 15 Aug. 2019 Climbing the stairs of the Stade de France to collect a runners-up medal following his side's defeat in the French Cup final, Neymar was drawn in to an altercation with a Rennes supporter which ended in the Brazilian aiming a sly punch at the fan. SI.com, "Neymar: 6 Defining Moments of the Brazilian's Two Years at Paris Saint-Germain," 3 Aug. 2019 After three nefarious farmers declare war on them, a sly fox rallies his animal neighbors to fight back. Los Angeles Times, "Here are the feature and TV films airing the week of Sunday, Aug. 11, 2019," 11 Aug. 2019 But before drama turned rapid-fire, there was the sly splendor of the 10 candidates on stage, standing side by side, captured with a trippy canniess by Brendan Smialowski. Jason Parham, WIRED, "Depth of Field: The Otherworldliness of the Democratic Presidential Debates," 1 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sly.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of sly

13th century, in the meaning defined at sense 1a

History and Etymology for sly

Middle English sleighe, sli, from Old Norse slœgr; akin to Old English slēan to strike — more at slay

Keep scrolling for more

Keep scrolling for more

More Definitions for sly

sly

adjective

English Language Learners Definition of sly

: clever in a dishonest way
: showing that you know a secret

sly

adjective
\ ˈslī How to pronounce sly (audio) \
slier or slyer; sliest or slyest

Kids Definition of sly

1 : both clever and tricky