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We found 30 dictionaries with English definitions that include the word headlong:
Click on the first link on a line below to go directly to a page where "headlong" is defined.

General (29 matching dictionaries)

1. headlong: Merriam-Webster.com [home, info]
2. headlong: Oxford Dictionaries [home, info]
3. headlong: American Heritage Dictionary of the English Language [home, info]
4. headlong: Collins English Dictionary [home, info]
5. headlong: Vocabulary.com [home, info]
6. headlong, headlong: Macmillan Dictionary [home, info]
7. Headlong, headlong: Wordnik [home, info]
8. headlong: Cambridge Advanced Learner's Dictionary [home, info]
9. headlong: Wiktionary [home, info]
10. headlong: Webster's New World College Dictionary, 4th Ed. [home, info]
11. headlong: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. headlong: Infoplease Dictionary [home, info]
13. Headlong, headlong: Dictionary.com [home, info]
14. headlong: Online Etymology Dictionary [home, info]
15. headlong: UltraLingua English Dictionary [home, info]
16. headlong: Cambridge Dictionary of American English [home, info]
17. Headlong (Frayn novel), Headlong (Williams novel), Headlong (song), Headlong (theatre company): Wikipedia, the Free Encyclopedia [home, info]
18. Headlong: Online Plain Text English Dictionary [home, info]
19. headlong: Webster's Revised Unabridged, 1913 Edition [home, info]
20. headlong: Rhymezone [home, info]
21. Headlong: AllWords.com Multi-Lingual Dictionary [home, info]
22. headlong: Webster's 1828 Dictionary [home, info]
23. headlong: Free Dictionary [home, info]
24. headlong: Mnemonic Dictionary [home, info]
25. headlong: WordNet 1.7 Vocabulary Helper [home, info]
26. headlong: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. headlong: Dictionary/thesaurus [home, info]

Business (1 matching dictionary)

28. Headlong (disambiguation), Headlong (novel), headlong: Legal dictionary [home, info]

(Note: See headlongs for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (headlong) ▸ adjective:  excessively quick ("A headlong rush to sell") ▸ adjective:  with the head foremost ("A headlong dive into the pool") ▸ adverb:  with the head foremost ("The runner slid headlong into third base") ▸ adverb:  in a hasty and foolhardy manner ("He fell headlong in love with his cousin") ▸ adverb:  at breakneck speed ("Burst headlong through the gate") ▸ Also see headlongs ▸ Word origin ▸ Words similar to headlong ▸ Usage examples for headlong ▸ Popular nouns described by headlong ▸ Words that often appear near headlong ▸ Rhymes of headlong ▸ Invented words related to headlong