(in the UK) a school for children between the ages of about 9 and 13 （英国为 9 到 13 岁儿童所设的）中间学校 (in the US and Canada) a school for children between the ages of about 11 and 14 （美国为 11 到 14 岁儿童所设的）中学，初中 compare junior high school, upper school