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We found 40 dictionaries with English definitions that include the word hardening:
Click on the first link on a line below to go directly to a page where "hardening" is defined.

General (25 matching dictionaries)

1. hardening: Merriam-Webster.com [home, info]
2. hardening: American Heritage Dictionary of the English Language [home, info]
3. hardening: Collins English Dictionary [home, info]
4. hardening: Vocabulary.com [home, info]
5. Hardening, hardening: Wordnik [home, info]
6. hardening: Cambridge Advanced Learner's Dictionary [home, info]
7. hardening: Wiktionary [home, info]
8. hardening: Webster's New World College Dictionary, 4th Ed. [home, info]
9. hardening: Infoplease Dictionary [home, info]
10. hardening: Dictionary.com [home, info]
11. hardening: UltraLingua English Dictionary [home, info]
12. hardening: Cambridge Dictionary of American English [home, info]
13. Hardening (botany), Hardening (computing), Hardening (metallurgy), Hardening: Wikipedia, the Free Encyclopedia [home, info]
14. Hardening: Online Plain Text English Dictionary [home, info]
15. hardening: Webster's Revised Unabridged, 1913 Edition [home, info]
16. hardening: Rhymezone [home, info]
17. Hardening: AllWords.com Multi-Lingual Dictionary [home, info]
18. hardening: Webster's 1828 Dictionary [home, info]
19. hardening: Free Dictionary [home, info]
20. hardening: Mnemonic Dictionary [home, info]
21. hardening: WordNet 1.7 Vocabulary Helper [home, info]
22. hardening: LookWAYup Translating Dictionary/Thesaurus [home, info]
23. hardening: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

24. Hardening: Glossary of Stamp Collecting Terms [home, info]

Business (5 matching dictionaries)

25. Hardening: bizterms.net [home, info]
26. Hardening: Construction Term Glossary [home, info]
27. Hardening: Investopedia [home, info]
28. hardening: Legal dictionary [home, info]
29. hardening: BusinessDictionary.com [home, info]

Computing (3 matching dictionaries)

30. hardening: Computer Telephony & Electronics Dictionary and Glossary [home, info]
31. Hardening: Technopedia [home, info]
32. hardening: Encyclopedia [home, info]

Medicine (1 matching dictionary)

33. hardening: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

34. hardening: Idioms [home, info]

Science (1 matching dictionary)

35. hardening: Botanical Terms [home, info]

Tech (3 matching dictionaries)

36. HARDENING: Metal Terminology [home, info]
37. Hardening: AUTOMOTIVE TERMS [home, info]
38. Hardening: Glossary of Fastener Terms [home, info]

(Note: See hardens for more definitions.)

Quick definitions from WordNet (hardening) ▸ noun:  the act of making something harder (firmer or tighter or more compact) ▸ noun:  the process of becoming hard or solid by cooling or drying or crystallization ("The hardening of concrete") ▸ noun:  abnormal hardening or thickening of tissue ▸ Also see hardens ▸ Words similar to hardening ▸ Usage examples for hardening ▸ Popular adjectives describing hardening ▸ Words that often appear near hardening ▸ Rhymes of hardening ▸ Invented words related to hardening