We found 30 dictionaries that define the word air pump:

General (23 matching dictionaries)

1. air pump: Merriam-Webster
2. air pump: Oxford Learner's Dictionaries
3. air pump: American Heritage Dictionary of the English Language
4. air pump: Collins English Dictionary
5. air pump: Vocabulary.com
6. air-pump, air pump: Wordnik
7. Air pump: InfoVisual Visual Dictionary
8. air-pump, air pump: Wiktionary
9. air pump: The Wordsmyth English Dictionary-Thesaurus
10. air pump: Infoplease Dictionary
11. Air pump, air pump: Dictionary.com
12. Air pump: Wikipedia, the Free Encyclopedia
13. Air pump: Online Plain Text English Dictionary
14. air pump: Rhymezone
15. Air pump: AllWords.com Multi-Lingual Dictionary
16. air-pump: Webster's 1828 Dictionary
17. air pump: FreeDictionary.org
18. air pump: Mnemonic Dictionary
19. air pump: TheFreeDictionary.com
20. air pump: Longman Dictionary of Contemporary English
21. air pump: Merriam-Webster

Business (1 matching dictionary)

22. air pump: Legal dictionary

Computing (1 matching dictionary)

23. air pump: Encyclopedia

Medicine (2 matching dictionaries)

24. online medical dictionary (No longer online)
25. air pump: Medical dictionary

Slang (1 matching dictionary)

26. Air-Pump: Urban Dictionary

Tech (2 matching dictionaries)

27. AUTOMOTIVE TERMS (No longer online)
28. Aquarium (No longer online)

(Note: See air_pumps as well.)

Definitions from Wiktionary (air pump) ▸ noun:  A pump that moves air either into or out of something. Similar: vacuum pump, air-pump, pump, force pump, airpipe, air compressor, compression pump, air line, pumpage, lift pump, more... Opposite: vacuum, suction, extractor, depressor Phrases: air lift pump, Air source heat pump, An Experiment on a Bird in the Air Pump, An Experiment with an Air Pump, Exhaust air heat pump, more... ▸ Words similar to air pump ▸ Usage examples for air pump ▸ Idioms related to air pump ▸ Wikipedia articles (New!) ▸ Words that often appear near air pump ▸ Rhymes of air pump ▸ Invented words related to air pump