a substance or appliance used to improve or maintain something's condition 调节剂;改良剂;调节器 add a water conditioner to neutralize chlorine. 加入水质改良剂来中和氯。 ■a liquid applied to the hair after shampooing to improve its condition 护发素,护发剂 to prevent static, always use a conditioner. 为防止静电,请经常使用护发素。 [mass noun]I have to use a lot of conditioner. 我不得不用许多护发素。