We found 17 dictionaries that define the word headphone:

General (14 matching dictionaries)

1. headphone: Merriam-Webster
2. headphone: American Heritage Dictionary of the English Language
3. headphone: Vocabulary.com
4. Headphone, headphone: Wordnik
5. headphone: Wiktionary
6. headphone: Webster's New World College Dictionary, 4th Ed.
7. headphone: The Wordsmyth English Dictionary-Thesaurus
8. headphone: Infoplease Dictionary
9. headphone: Dictionary.com
10. Headphone: Wikipedia, the Free Encyclopedia
11. headphone: Rhymezone
12. headphone: FreeDictionary.org
13. headphone: Mnemonic Dictionary
14. headphone: TheFreeDictionary.com

Computing (1 matching dictionary)

15. headphone: Encyclopedia

Slang (1 matching dictionary)

16. headphone: Urban Dictionary

Tech (1 matching dictionary)

17. Glossary of video terms (No longer online)

(Note: See headphones as well.)

Definitions from Wiktionary (headphone) ▸ noun:  A cushioned speaker placed on, over, or inside the ear, normally used in left/right pairs. Similar: earphone, earpiece, phone, headset, headpiece, hearing aid, headphone concert, soundhead, head, headpeace, more... Opposite: speaker Phrases: Headphone amplifier, Simple Headphone Mind, more... Adjectives: wireless, single, right, crystal, left, dynamic, isodynamic, ordinary, aural, high, weightless ▸ Words similar to headphone ▸ Usage examples for headphone ▸ Idioms related to headphone ▸ Wikipedia articles (New!) ▸ Popular adjectives describing headphone ▸ Words that often appear near headphone ▸ Rhymes of headphone ▸ Invented words related to headphone