We found 21 dictionaries that define the word paperboard:

General (16 matching dictionaries)

1. paperboard: Merriam-Webster
2. paperboard: Oxford Learner's Dictionaries
3. paperboard: American Heritage Dictionary of the English Language
4. paperboard: Collins English Dictionary
5. paperboard: Vocabulary.com
6. Paperboard, paperboard: Wordnik
7. paperboard: Wiktionary
8. paperboard: Webster's New World College Dictionary, 4th Ed.
9. paperboard: The Wordsmyth English Dictionary-Thesaurus
10. paperboard: Infoplease Dictionary
11. paperboard: Dictionary.com
12. Paperboard: Wikipedia, the Free Encyclopedia
13. paperboard: Rhymezone
14. paperboard: FreeDictionary.org
15. paperboard: Mnemonic Dictionary
16. paperboard: TheFreeDictionary.com

Business (2 matching dictionaries)

17. Construction Term Glossary (No longer online)
18. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

19. paperboard: Encyclopedia

Tech (2 matching dictionaries)

20. Paperboard: TheFurniture.com
21. Paper Industry (No longer online)

(Note: See paperboards as well.)

Definitions from Wiktionary (paperboard) ▸ noun:  A thick paper, or thin cardboard. Similar: posterboard, paper board, board, cardboard, carton, pressboard, hardboard, pulpboard, cardboard box, cartonnage, more... Opposite: cardboard, corrugated board, chipboard Adjectives: corrugated, recycled, coated, bleached, heavy, laminated, ply, white, stiff, unbleached, most ▸ Words similar to paperboard ▸ Usage examples for paperboard ▸ Idioms related to paperboard ▸ Wikipedia articles (New!) ▸ Popular adjectives describing paperboard ▸ Words that often appear near paperboard ▸ Rhymes of paperboard ▸ Invented words related to paperboard