noun: (education) Initialism of in-school suspension. [(education) A type of primary and secondary school suspension method in which, for a given period of time, the students being punished are not allowed to go to their regular classes, but are still required to attend school to instead be kept in an alternative setting that usually involves immobility and the performing of school-related activities.]
noun: (space science) Initialism of International Space Station. [An artificial satellite in low-earth orbit operating by a number of cooperating space programmes.]
