Meanings
adverblong since (not comparable)
- idiomaticnot comparableLong ago; in the (distant) past.
The building has long since been demolished.
2 more examples
I don't know why he asked me to do that, when I had long since finished it.
Reluctantly Raj used his fingernail to prise away the bogie he had long since sneezed up there and popped it in his mouth.
2012, David Walliams [pseudonym; David Edward Williams], Ratburger, London: HarperCollins Children’s Books, →ISBN
Synonyms & antonyms
More synonyms by meaning
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
APA
long since. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/long%20since
MLA
“long since.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/long%20since. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “long since,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/long%20since.
Source: long since on Wiktionary, CC BY-SA 4.0.