We found 13 dictionaries that define the word three-day event:

General (9 matching dictionaries)

1. three-day event, three-day event: Collins English Dictionary
2. three-day event: Vocabulary.com
3. three-day event: Dictionary.com
4. three-day event: Rhymezone
5. three-day event: FreeDictionary.org
6. three-day event: Mnemonic Dictionary
7. three-day event: TheFreeDictionary.com

Computing (1 matching dictionary)

8. three-day event: Encyclopedia

Medicine (1 matching dictionary)

9. three-day event: Medical dictionary

Sports (2 matching dictionaries)

10. Hickok Sports Glossaries (No longer online)
11. Three-day event: Sports Definitions

(Note: See three-day_eventing as well.)

Definitions from WordNet (three-day event) ▸ noun:  an equestrian competition; the first day is dressage; the second is cross-country jumping; the third is stadium jumping Opposite: single-day event, multi-day event, non-event ▸ Words similar to three-day event ▸ Usage examples for three-day event ▸ Idioms related to three-day event ▸ Wikipedia articles (New!) ▸ Words that often appear near three-day event ▸ Rhymes of three-day event ▸ Invented words related to three-day event