countertariff noun 1verb 1forms 3 noun1 •A tariff created in retaliation for another tariff.Just under 40% of global corporate revenue is earned in international markets, with 18% possibly at risk from proposed U.S. tariffs and potential countertariffs. — 2025 verb1 •To impose a countertariff.Canada plans to quickly countertariff high-profile items such as coffee from Louisiana and bourbon from Kentucky, similar to how it responded in 2018 when Trump taxed steel and aluminum imports. — 2025 formscountertariffed · countertariffing · countertariffs