全寮制の学校って英語でなんて言うの？

Boarding school this is a noun.It refers to a school which provides accommodation(place to stay) and meals for the pupils during term time. For example: "I learn at a boarding school."

>Boarding School *A boarding school is a pre-university level school where most or all of the students take up residence when school is in session. The word ”boarding” is used in the sense of "room and board," i.e., lodging and meals. Boarding schools are also known as University or College Preparatory Schools, aka “Prep Schools.” Some boarding schools also have day students who attend the institution by day and return to their families in the evenings.

One type of traditional school in the UK is the boarding school. Such a school would usually also be a 'public school.' It may appear strange, but in the UK, a 'public school' is a private school where the parents of children attending have to pay for the tuition and boarding fees. Most state schools in the UK are free to attend - but not boarding schools. "James attends a boarding school in Manchester."

A boarding school is a school where pupils stay and live there during term time and only sometimes return home on weekends/during holidays the term 'boarding' comes from the words 'room/board' meaning to have your room and to stay there

When referring to regular school, such as middle or high schools, in which the students live on campus, we call this place a 'boarding school'. This is because we use the word 'board' when talking about someone receiving meals while living at a place. Also, the rooms in which students reside are calls 'dormitories' or 'dorms' for short. You will also have dorms at some colleges and universities.

A school where the students live in the dormitories at the school is known as a boarding school.