See anti-perspirant for more anti·per·spir·antBrE /ˌæntiˈpɜːspərənt/ 🔊NAmE /ˌæntiˈpɜːrspərənt/ 🔊 noun [uncountable, countable] a substance that people use, especially under their arms, to prevent or reduce sweat 止汗剂 ➡ see also deodorant