We found 26 dictionaries that define the word tip-off:

General (20 matching dictionaries)

1. tip-off: Merriam-Webster
2. tip-off: Oxford Learner's Dictionaries
3. tip-off, tip-off: American Heritage Dictionary of the English Language
4. tip-off, tip-off: Collins English Dictionary
5. tip-off: Vocabulary.com
6. Tip-Off, Tip-off, tip-off: Wordnik
7. tip-off: Cambridge Advanced Learner's Dictionary
8. tip-off: Wiktionary
9. tip-off: Webster's New World College Dictionary, 4th Ed.
10. tip-off: The Wordsmyth English Dictionary-Thesaurus
11. tip-off: Infoplease Dictionary
12. tip-off: Dictionary.com
13. tip-off: Cambridge Essential American English Dictionary
14. The Tip-Off: Wikipedia, the Free Encyclopedia
15. tip-off: Rhymezone
16. tip-off: FreeDictionary.org
17. tip-off: Mnemonic Dictionary
18. tip-off: TheFreeDictionary.com

Computing (1 matching dictionary)

19. tip-off: Encyclopedia

Miscellaneous (1 matching dictionary)

20. tip-off: Wordcraft Dictionary

Slang (2 matching dictionaries)

21. tip-off: Green’s Dictionary of Slang
22. tip-off: Urban Dictionary

Sports (2 matching dictionaries)

23. Sports Terms (No longer online)
24. Hickok Sports Glossaries (No longer online)

(Note: See tip-offs as well.)

Definitions from Wiktionary ( ) ▸ noun:  (idiomatic) An obvious clue or indication. ▸ noun:  (idiomatic) A report of suspicious behaviour, especially to an authority. Similar: tap-off, tipoff, point, item, pro tip, pointer, finger, tip-bait, finger-post, clue stick, more... Opposite: cluelessness, unawareness, ignorance Types: verbal, nonverbal, physical, more... ▸ Words similar to tip-off ▸ Usage examples for tip-off ▸ Idioms related to tip-off ▸ Wikipedia articles (New!) ▸ Popular adjectives describing tip-off ▸ Words that often appear near tip-off ▸ Rhymes of tip-off ▸ Invented words related to tip-off