We found 25 dictionaries that define the word air conditioner:

General (18 matching dictionaries)

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

Business (1 matching dictionary)

17. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

18. Air-conditioner, air conditioner: Encyclopedia

Slang (1 matching dictionary)

19. Air Conditioner: Urban Dictionary

Tech (4 matching dictionaries)

20. AUTOMOTIVE TERMS (No longer online)
21. Glossary of Energy Terms (No longer online)
22. AIR CONDITIONER: The Home Appliance Page
23. AIR CONDITIONER: Power Engineering

(Note: See air-condition as well.)

Definitions from Wiktionary (air conditioner) ▸ noun:  A machine that is used to control temperature and humidity in an enclosed space. Similar: air conditioning, climate control, air compressor, compressor, air fryer, machine, household appliance, airpipe, forced air, air motor, more... Opposite: heater, furnace, radiator Types: central, window, portable, split-system, geothermal, evaporative cooler, more... Phrases: air conditioner lung, unitary air conditioner, Packaged terminal air conditioner, air blowing from an air conditioner, air blowing from an air conditioner, more... Adjectives: water cooler, a/c, recipient, heating, serpentine, flue, exhaust, refrigeratory, overfire, fallback, autoclave ▸ Words similar to air conditioner ▸ Usage examples for air conditioner ▸ Idioms related to air conditioner ▸ Wikipedia articles (New!) ▸ Words that often appear near air conditioner ▸ Rhymes of air conditioner ▸ Invented words related to air conditioner