We found 24 dictionaries that define the word air lock:

General (16 matching dictionaries)

1. air lock: Merriam-Webster
2. air lock: Oxford Learner's Dictionaries
3. air lock: American Heritage Dictionary of the English Language
4. air lock: Vocabulary.com
5. air-lock, air lock: Wordnik
6. air lock: Wiktionary
7. air lock: The Wordsmyth English Dictionary-Thesaurus
8. air lock: Infoplease Dictionary
9. Air lock, air-lock, air lock: Dictionary.com
10. Air lock: Wikipedia, the Free Encyclopedia
11. air lock: Rhymezone
12. air lock: FreeDictionary.org
13. air lock: Mnemonic Dictionary
14. air lock, lock, air: TheFreeDictionary.com
15. air lock: Longman Dictionary of Contemporary English
16. air lock: Merriam-Webster

Business (1 matching dictionary)

17. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

18. air lock, lock, air: Encyclopedia

Medicine (1 matching dictionary)

19. online medical dictionary (No longer online)

Slang (1 matching dictionary)

20. air lock: Urban Dictionary

Sports (1 matching dictionary)

21. Glossary of Canoe Terminology (No longer online)

Tech (3 matching dictionaries)

22. AUTOMOTIVE TERMS (No longer online)
23. Glossary of Coal Mining Terms (No longer online)
24. Lake and Water Word Glossary (No longer online)

(Note: See air_locks as well.)

Definitions from Wiktionary (air lock) ▸ noun:  A small amount of air in a pipe that stops liquid flowing through it. Similar: airlock, vapor lock, hydrostatic lock, lockshield, bleed, air bubble, freeze valve, liquid air, vacuum valve, vapour lock, more... Opposite: airtight, airtight seal, vacuum seal Adjectives: piping, flue, jet, exhaust, overfire, cutoff, male, steam, draft, noncondensing, propellant ▸ Words similar to air lock ▸ Usage examples for air lock ▸ Idioms related to air lock ▸ Wikipedia articles (New!) ▸ Words that often appear near air lock ▸ Rhymes of air lock ▸ Invented words related to air lock