We found 14 dictionaries that define the word box beam:

General (12 matching dictionaries)

1. box beam: Merriam-Webster
2. box beam: Oxford Learner's Dictionaries
3. box beam: Collins English Dictionary
4. box beam: Vocabulary.com
5. box beam: Wordnik
6. box beam: Infoplease Dictionary
7. Box beam, box beam: Dictionary.com
8. Box beam: Wikipedia, the Free Encyclopedia
9. box beam: Rhymezone
10. box beam: FreeDictionary.org
11. box beam: Mnemonic Dictionary
12. box beam: TheFreeDictionary.com

Business (1 matching dictionary)

13. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

14. box beam: Encyclopedia

(Note: See box_beams as well.)

Definitions from WordNet (box beam) ▸ noun:  a beam built up from boards; has a hollow rectangular cross section ▸ Words similar to box beam ▸ Usage examples for box beam ▸ Idioms related to box beam ▸ Wikipedia articles (New!) ▸ Words that often appear near box beam ▸ Rhymes of box beam ▸ Invented words related to box beam