We found one dictionary that defines the word tariffism:

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1. tariffism: Wiktionary

Definitions from Wiktionary (tariffism) ▸ noun:  A system of economic tariffs. ▸ Words similar to tariffism ▸ Usage examples for tariffism ▸ Idioms related to tariffism ▸ Wikipedia articles (New!) ▸ Popular adjectives describing tariffism ▸ Words that often appear near tariffism ▸ Rhymes of tariffism ▸ Invented words related to tariffism