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We found 10 dictionaries with English definitions that include the word pertinaciousness:
Click on the first link on a line below to go directly to a page where "pertinaciousness" is defined.

General (9 matching dictionaries)

1. pertinaciousness: Merriam-Webster.com [home, info]
2. pertinaciousness: Oxford Dictionaries [home, info]
3. pertinaciousness: Collins English Dictionary [home, info]
4. pertinaciousness: Wordnik [home, info]
5. pertinaciousness: Wiktionary [home, info]
6. pertinaciousness: Dictionary.com [home, info]
7. pertinaciousness: Webster's 1828 Dictionary [home, info]
8. pertinaciousness: Free Dictionary [home, info]
9. pertinaciousness: Dictionary/thesaurus [home, info]

Business (1 matching dictionary)

10. pertinaciousness: Legal dictionary [home, info]

(Note: See pertinacity for more definitions.)

Quick definitions from WordNet (pertinacity) ▸ noun:  persistent determination ▸ Also see pertinacity ▸ Words similar to pertinaciousness ▸ Usage examples for pertinaciousness ▸ Popular adjectives describing pertinaciousness ▸ Words that often appear near pertinaciousness ▸ Rhymes of pertinaciousness ▸ Invented words related to pertinaciousness