since when

Definition of since when

  1. —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?

Word by Word Definitions

sinceplay
  1. :  from a definite past time until now

    :  before the present time :  ago

    :  after a time in the past :  subsequently

  1. :  at a time in the past after or later than :  from the time in the past when

    :  when

    :  in view of the fact that :  because

  1. :  in the period after a specified time in the past :  from a specified time in the past


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