since when

idiom

Definition of since when

used to show that one is surprised and often angry, annoyed, or doubtful about what someone has said or done "I'm a vegetarian." "Since when?""You told me to do it." "Since when did you start listening to me?"Since when is it okay to cheat?

Learn More About since when

Statistics for since when

Cite this Entry

“Since when.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/since%20when. Accessed 26 Jul. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!