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Synonyms

on the sly

Idioms  
  1. Furtively, secretly, as in She's always eating cookies on the sly. The adjective sly, which means “cunning” or “crafty,” is here used as a noun. [c. 1800]


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"On the sly," Onishi said, someone like that can "listen to the podcast, watch the YouTube channel" and come to understand "the other ways people think" and "why they left."

From Salon • Mar. 8, 2024

On the sly, at acoustic nights around Wimbledon, Treays even did the odd live show.

From The Guardian • Sep. 21, 2014

On the sly, he began to teach himself to play the violin.

From New York Times • Aug. 26, 2011

On the sly, Editor Arthur M. Nelson of the Sentinel entered the Penny Pencil department for the Crowell prize.

From Time Magazine Archive

On the sly we studied grammar, his cleverness helping me over many a stumbling-block.

From Jewish Literature and Other Essays by Karpeles, Gustav