We found 20 dictionaries that define the word tension headache:

General (10 matching dictionaries)

1. tension headache: Merriam-Webster
2. tension headache: Collins English Dictionary
3. tension headache: Vocabulary.com
4. tension headache: Wiktionary
5. tension headache: Dictionary.com
6. Tension headache: Wikipedia, the Free Encyclopedia
7. tension headache: Rhymezone
8. tension headache: FreeDictionary.org
9. tension headache: Mnemonic Dictionary
10. tension headache: TheFreeDictionary.com

Business (1 matching dictionary)

11. tension headache: Legal dictionary

Computing (1 matching dictionary)

12. tension headache: Encyclopedia

Medicine (8 matching dictionaries)

13. tension headache: Merriam-Webster Medical Dictionary
14. Dorland's Illustrated Medical Dictionary (No longer online)
15. Headache, tension: MedTerms.com Medical Dictionary
16. online medical dictionary (No longer online)
17. Tension headache: MEDLINE plus Illustrated Medical Encyclopedia
18. tension headache: Medical dictionary
19. University of Maryland Glossary of Medical Terms (No longer online)
20. Headache, tension: Drug Medical Dictionary

(Note: See tension_headaches as well.)

Definitions from Wiktionary (tension headache) ▸ noun:  A common form of headache characterised by a feeling of constant pressure, frequently on both sides of the head at the same time. Similar: tension, orthophoria, tangence, cointension, counterpressure, combination tone, vergence, common thread, concomitant, echoacousia, more... Opposite: migraine, relaxation headache, cluster headache Phrases: tension type headache, more... ▸ Words similar to tension headache ▸ Usage examples for tension headache ▸ Idioms related to tension headache ▸ Wikipedia articles (New!) ▸ Words that often appear near tension headache ▸ Rhymes of tension headache ▸ Invented words related to tension headache