We found 13 dictionaries that define the word headaches:

General (9 matching dictionaries)

1. headaches: Merriam-Webster
2. headaches: Collins English Dictionary
3. headaches: Vocabulary.com
4. Headaches, headaches: Wordnik
5. headaches: Cambridge Advanced Learner's Dictionary
6. headaches: Wiktionary
7. headaches: Dictionary.com
8. Headaches: Wikipedia, the Free Encyclopedia
9. Headaches: TheFreeDictionary.com

Computing (1 matching dictionary)

10. Headaches: Encyclopedia

Medicine (3 matching dictionaries)

11. headaches: Merriam-Webster Medical Dictionary
12. Headaches: Merck Manuals
13. Headaches: Medical dictionary

(Note: See headache as well.)

Definitions from Wiktionary (headache) ▸ noun:  (medicine) A pain or ache in the head. ▸ noun:  (figurative) A nuisance or unpleasant problem. ▸ Also see headache Opposite: relief, comfort, ease, tranquility Phrases: migraine headaches, tension headaches, cluster headaches, vascular headaches, sick headaches, more... Adjectives: severe, chronic, frequent, more, recurrent, sick, violent, bad, terrible, type, nervous ▸ Words similar to headaches ▸ Usage examples for headaches ▸ Idioms related to headaches ▸ Wikipedia articles (New!) ▸ Popular adjectives describing headaches ▸ Words that often appear near headaches ▸ Rhymes of headaches ▸ Invented words related to headaches