We found 22 dictionaries that define the word HVAC:

General (9 matching dictionaries)

1. HVAC: Merriam-Webster
2. hvac: Wordnik
3. HVAC: Wiktionary
4. HVAC: Webster's New World College Dictionary, 4th Ed.
5. HVAC: Infoplease Dictionary
6. HVAC: Dictionary.com
7. HVAC (organization), HVAC, Hvac: Wikipedia, the Free Encyclopedia
8. HVAC: Stammtisch Beau Fleuve Acronyms
9. HVAC: Merriam-Webster

Business (4 matching dictionaries)

10. Construction Term Glossary (No longer online)
11. HVAC: Energy Dictionary
12. HVAC: Financial dictionary
13. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

14. HVAC: Encyclopedia

Miscellaneous (2 matching dictionaries)

15. HVAC: Acronym Finder
16. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

17. HVAC: Urban Dictionary

Tech (5 matching dictionaries)

18. AUTOMOTIVE TERMS (No longer online)
19. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
20. Energy Terms (No longer online)
21. Rane Professional Audio Reference (No longer online)
22. HVAC: Power Engineering

Definitions from Wiktionary (HVAC) ▸ noun:  Initialism of heating, ventilation, and air conditioning. [A system that raises the temperature of a room or building. Compare heater.] Similar: Honeywell, Trane, ductwork, plumbing, delco, furnace, ductless, electrician, hydronic, roofing, more... Opposite: acvh Types: heat pump, furnace, boiler, ductless mini-split, geothermal HVAC, more... Phrases: hvac system, HVAC control system, Glossary of HVAC terms, more... Adjectives: non, mechanical, structural, commercial, conventional, high, electrical, hypertext, new, handbook, baked Colors:     blue,     red,     green,     yellow,     orange, more... ▸ Words similar to HVAC ▸ Usage examples for HVAC ▸ Idioms related to HVAC ▸ Wikipedia articles (New!) ▸ Popular adjectives describing HVAC ▸ Words that often appear near HVAC ▸ Rhymes of HVAC ▸ Invented words related to HVAC