middle school
noun [ C ] uk/ˈmɪd.əl ˌskuːl/ us/ˈmɪd.əl ˌskuːl/
（英国9至14岁儿童入学的）中学
in parts of the UK, a school for children between the ages of about nine and 14
（美国11至14岁儿童入学的）中学
in parts of the US, a school for children between the ages of about 11 and 13