プログレッシブ和英中辞典(第4版)の解説
ちゅうがく【中学】
a lower secondary school；《米》 a junior high school; a middle school
公［私］立中学に通う
attend a public [private] junior high school
中学１年です
《米》 I'm a seventh grader.／I'm in the first year of junior high school.
中学時代には野球部にいた
「When I was in junior high school [In my junior high school days], I belonged to the baseball club.
中学生
a lower secondary school pupil，《米》 a junior high school student [boy/girl]
中学卒業生
a junior high school graduate