We found 20 dictionaries that define the word red lead:

General (15 matching dictionaries)

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

Business (1 matching dictionary)

16. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

17. Red-lead, red lead: Encyclopedia

Medicine (1 matching dictionary)

18. online medical dictionary (No longer online)

Tech (2 matching dictionaries)

19. AUTOMOTIVE TERMS (No longer online)
20. SeaTalk Dictionary of English Nautical Language (No longer online)

(Note: See red_leads as well.)

Definitions from Wiktionary (red lead) ▸ noun:  A bright red, poisonous oxide of lead, Pb₃O₄, used as a pigment and in glass and ceramics. ▸ noun:  (military slang, dated) tomato ketchup. Similar: minium, lead oxide, litharge, lead monoxide, blue lead, red oxide, blacklead, white lead, lead dioxide, lead white, more... Phrases: red lead putty, red lead ore, more... ▸ Words similar to red lead ▸ Usage examples for red lead ▸ Idioms related to red lead ▸ Wikipedia articles (New!) ▸ Words that often appear near red lead ▸ Rhymes of red lead ▸ Invented words related to red lead