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We found 9 dictionaries with English definitions that include the word hard hats:
Click on the first link on a line below to go directly to a page where "hard hats" is defined.

General (8 matching dictionaries)

1. hard hats: Merriam-Webster.com [home, info]
2. hard hats: Collins English Dictionary [home, info]
3. hard hats: Vocabulary.com [home, info]
4. hard-hats: Wordnik [home, info]
5. hard hats: Cambridge Advanced Learner's Dictionary [home, info]
6. hard hats: Wiktionary [home, info]
7. hard-hats: Dictionary.com [home, info]
8. Hard hats: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

9. Hard hats: Encyclopedia [home, info]

(Note: See hard_hat for more definitions.)

Quick definitions from WordNet (hard hat) ▸ noun:  a lightweight protective helmet (plastic or metal) worn by construction workers ▸ noun:  a worker skilled in building offices or dwellings etc. ▸ Also see hard_hat ▸ Words similar to hard hats ▸ Usage examples for hard hats ▸ Idioms related to hard hats (New!) ▸ Words that often appear near hard hats ▸ Rhymes of hard hats ▸ Invented words related to hard hats