long since

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long since (not comparable)

1. (idiomatic) Long ago; in the (distant) past.

   I don't know why he asked me to do that, when I had long since finished it.

   The building has long since been demolished.

   • 2012, David Walliams [pseudonym; David Edward Williams], Ratburger, London: HarperCollins Children’s Books, →ISBN:

     Reluctantly Raj used his fingernail to prise away the bogie he had long since sneezed up there and popped it in his mouth.

• of old, way back; see also Thesaurus:long ago

• lang syne

• closening, enclosing