We found one dictionary that defines the word macronationally:

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1. macronationally: Wiktionary

Definitions from Wiktionary (macronationally) ▸ adverb:  In a macronational manner or context. ▸ Words similar to macronationally ▸ Usage examples for macronationally ▸ Idioms related to macronationally ▸ Wikipedia articles (New!) ▸ Words that often appear near macronationally ▸ Rhymes of macronationally ▸ Invented words related to macronationally