We found 15 dictionaries that define the word board up:

General (10 matching dictionaries)

1. board up: Vocabulary.com
2. board up: Wiktionary
3. board up: Dictionary.com
4. board up: Rhymezone
5. board up: FreeDictionary.org
6. board up: Mnemonic Dictionary
7. board up: TheFreeDictionary.com
8. board up: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

9. board up: Legal dictionary

Computing (1 matching dictionary)

10. board up: Encyclopedia

Medicine (1 matching dictionary)

11. board up: Medical dictionary

Miscellaneous (1 matching dictionary)

12. board up: Idioms

Slang (1 matching dictionary)

13. board up: Urban Dictionary

Definitions from Wiktionary (board up) ▸ verb:  (transitive) To block doors or windows with boards, either to prevent access or as protection from storms, etc. Similar: gatekeep, roofbolt, house, bunker, two-block, bunk, fall home, call time, penthouse, shelter in place, more... Opposite: unboard, uncover, unseal, open, unblock ▸ Words similar to board up ▸ Usage examples for board up ▸ Idioms related to board up ▸ Wikipedia articles (New!) ▸ Words that often appear near board up ▸ Rhymes of board up ▸ Invented words related to board up