since when Meaning in the Cambridge English Dictionary Cambridge dictionaries logo

Meaning of “since when” in the English Dictionary

"since when" in British English

See all translations

since when

used ​angrily in ​speech to ​ask someone why they ​believe a ​situation to be different from how it really is: Since when do you have the ​right to ​tell me what to do?
(Definition of since when from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"since when" in American English

See all translations

since when

for how ​long have you ​believed: Since when do you have the ​right to ​tell me what to do? Note: Used in questions to show anger because you do not believe something is right or true.
(Definition of since when from the Cambridge Academic Content Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website
Word of the Day

parade

a large number of people walking or in vehicles, all going in the same direction, usually as part of a public celebration of something

Word of the Day

I used to work hard/I’m used to working hard (Phrases with ‘used to’)
I used to work hard/I’m used to working hard (Phrases with ‘used to’)
by Kate Woodford,
February 10, 2016
On this blog, we like to look at words and phrases in the English language that learners often have difficulty with. Two phrases that can be confused are ‘used to do something’ and ‘be used to something/doing something’. People often use one phrase when they mean the other, or they use the wrong

Read More 

farecasting noun
farecasting noun
February 08, 2016
predicting the optimum date to buy a plane ticket, especially on a website or using an app A handful of new and updated websites and apps are trying to perfect the art of what’s known as farecasting – predicting the best date to buy a ticket.

Read More