A loanword from English, used in contexts related to the American education system or international schools. In Japan, the native term 高等学校 (こうとうがっこう) or its abbreviation 高校 (こうこう) is far more common.
She attends a senior high school in the United States.
Spelling with interpuncts, sometimes used for clarity or in formal contexts.
Loanword from English 'senior high school'.