We found 27 dictionaries that define the word roadblock:

General (21 matching dictionaries)

1. roadblock: Longman Dictionary of Contemporary English
2. roadblock: Merriam-Webster
3. roadblock: Oxford Learner's Dictionaries
4. roadblock: American Heritage Dictionary of the English Language
5. roadblock: Collins English Dictionary
6. roadblock: Vocabulary.com
7. Roadblock, roadblock: Wordnik
8. roadblock: Cambridge Advanced Learner's Dictionary
9. roadblock: Wiktionary
10. roadblock: Webster's New World College Dictionary, 4th Ed.
11. roadblock: The Wordsmyth English Dictionary-Thesaurus
12. roadblock: Infoplease Dictionary
13. roadblock: Dictionary.com
14. roadblock: Cambridge Essential American English Dictionary
15. Roadblock (G.I. Joe), Roadblock (The Amazing Race), Roadblock (barrier), Roadblock (disambiguation), Roadblock (film), Roadblock (robot), Roadblock (wrestler), Roadblock: Wikipedia, the Free Encyclopedia
16. roadblock: Rhymezone
17. roadblock: FreeDictionary.org
18. roadblock: Mnemonic Dictionary
19. roadblock: TheFreeDictionary.com

Business (2 matching dictionaries)

20. roadblock: Merriam-Webster Legal Dictionary
21. Glossary of Legal Terms (No longer online)

Computing (1 matching dictionary)

22. roadblock: Encyclopedia

Miscellaneous (1 matching dictionary)

23. Brilliant Dream Dictionary (No longer online)

Slang (2 matching dictionaries)

24. Roadblock (offensive): Racial Slur Database
25. roadblock: Urban Dictionary

(Note: See roadblocked as well.)

Definitions from Wiktionary ( ) ▸ noun:  Something that blocks or obstructs a road. ▸ noun:  (figurative) An obstacle or impediment. ▸ verb:  (colloquial, transitive) To prevent, hinder. Similar: barrier, barricade, blockade, block, crash barrier, cautionary block, boom barrier, police barrier, bottleneck, dead block, more... Opposite: help, assistance, support Phrases: hit a roadblock, erecting roadblock, more... Adjectives: major, first, biggest, serious, second, potential, main, last, significant, military, formidable Colors:     gray,     yellow,     orange,     red,     black, more... ▸ Words similar to roadblock ▸ Usage examples for roadblock ▸ Idioms related to roadblock ▸ Wikipedia articles (New!) ▸ Popular adjectives describing roadblock ▸ Words that often appear near roadblock ▸ Rhymes of roadblock ▸ Invented words related to roadblock