We found one dictionary that defines the word nonforeignness:

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1. nonforeignness: Wiktionary

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