calm² v [T] to make someone quiet after they have been angry, excited, or upset 使〔某人〕镇定［平静］: Matt was trying to calm the baby. 马特正试图让婴儿安静下来。
calm down to become quiet after you have been angry, excited, or upset, or to make someone become quiet （使）〔某人〕安静下来，使平静: Calm down and tell me what happened. 冷静点，告诉我发生了什么事。 It took a while to calm the kids down. 让孩子们安静下来花了一些时间。