We found 2 dictionaries that define the word first-rateness:

General (2 matching dictionaries)

1. first-rateness: Merriam-Webster
2. first-rateness: Wiktionary

(Note: See first-rate as well.)

Definitions from Wiktionary (first-rateness) ▸ noun:  The state of being first-rate ▸ Words similar to first-rateness ▸ Usage examples for first-rateness ▸ Idioms related to first-rateness ▸ Wikipedia articles (New!) ▸ Popular adjectives describing first-rateness ▸ Words that often appear near first-rateness ▸ Rhymes of first-rateness ▸ Invented words related to first-rateness