We found 20 dictionaries that define the word pyramids:

General (11 matching dictionaries)

1. pyramids: Longman Dictionary of Contemporary English
2. pyramids: Merriam-Webster
3. pyramids: Collins English Dictionary
4. Pyramids, pyramids: Vocabulary.com
5. Pyramid's, Pyramids, pyramid's, pyramids: Wordnik
6. pyramids, the Pyramids, the pyramids: Cambridge Advanced Learner's Dictionary
7. Pyramids, pyramids: Wiktionary
8. pyramids: Dictionary.com
9. pyramids: Cambridge Essential American English Dictionary
10. Pyramids (Bathgate), Pyramids (novel), Pyramids (song), Pyramids, The Pyramids (Indianapolis), The Pyramids (band), The Pyramids: Wikipedia, the Free Encyclopedia
11. pyramids: TheFreeDictionary.com

Business (3 matching dictionaries)

12. pyramids: Merriam-Webster Legal Dictionary
13. pyramids: Legal dictionary
14. pyramids: Financial dictionary

Computing (1 matching dictionary)

15. pyramids: Encyclopedia

Medicine (3 matching dictionaries)

16. pyramids: Merriam-Webster Medical Dictionary
17. Pyramids: Gray's Anatomy (1918)
18. pyramids: Medical dictionary

Miscellaneous (1 matching dictionary)

19. Encyclopedia of the Orient (No longer online)

Religion (1 matching dictionary)

20. Irivng Hexham's Concise Dictionary of Religion (No longer online)

(Note: See pyramid as well.)

Definitions from Wiktionary (Pyramids) ▸ noun:  A set of ancient pyramidal-shaped constructions in Egypt, mostly built as tombs for the pharaohs. ▸ noun:  The game of pyramid pool. Similar: Ancient Egypt, Cheops, Tutankhamun, necropolis, Abydos, Memphis, dolmen, pharaon, Egyptianism, pschent, more... Opposite: inverted pyramid, reverse pyramid, upside-down pyramid Phrases: great pyramids, renal pyramids, medullary pyramids, truncated pyramids, food pyramids, more... Adjectives: great, egyptian, small, renal, sided, largest, truncated, triangular, huge, anterior, ancient ▸ Words similar to pyramids ▸ Usage examples for pyramids ▸ Idioms related to pyramids ▸ Wikipedia articles (New!) ▸ Popular adjectives describing pyramids ▸ Words that often appear near pyramids ▸ Rhymes of pyramids ▸ Invented words related to pyramids