SINCEWHEN

since when

Adverb

since when

  1. From what time.
  2. (as an interrogative interjection) Used to indicate doubt as to the veracity of a statement.


The above text is a snippet from Wiktionary: since when
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!