(aviation) economy class

first class (a status, section, etc. of premier rank)

business class

(education) instruction that takes place outside of a classroom (field trip, etc.) / (education) class that takes place in its own specialized room instead of homeroom (such as music or cooking)

in class

a visit by a student's guardians to observe the class

Short for 各駅停車 (kakueki teisha, “a train that stops at every station on the line”). / a state of stopping at every station on the line

every quarter; all sides

(zoology) clasper

エコノミークラス症候群: economy class syndrome, deep vein thrombosis