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We found 11 dictionaries with English definitions that include the word long since:
Click on the first link on a line below to go directly to a page where "long since" is defined.

General (11 matching dictionaries)

1. long since: Merriam-Webster.com [home, info]
2. long since: Vocabulary.com [home, info]
3. long-since: Wordnik [home, info]
4. long since: Wiktionary [home, info]
5. long since: Dictionary.com [home, info]
6. long since: Rhymezone [home, info]
7. long since: Free Dictionary [home, info]
8. long since: Mnemonic Dictionary [home, info]
9. long since: WordNet 1.7 Vocabulary Helper [home, info]
10. long since: LookWAYup Translating Dictionary/Thesaurus [home, info]
11. long since: Dictionary/thesaurus [home, info]

Quick definitions from WordNet (long since) ▸ adverb:  of the distant or comparatively distant past ("He has long since given up mountain climbing") ▸ Words similar to long since ▸ Usage examples for long since ▸ Idioms related to long since (New!) ▸ Words that often appear near long since ▸ Rhymes of long since ▸ Invented words related to long since