time / hour / the hours or time when something happens

Abbreviation of ホームルーム (hōmurūmu).

discuss

(software engineering) class diagram - A type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, and the relationships between the classes.

(education) class (group of students in a regularly scheduled meeting with a teacher) / class of things (typically products) sharing certain features / (programming, object-oriented programming) class

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

timetable

an hour-long period

(dialect, Ibaraki) time / (dialect, Ibaraki) hour / (dialect, Ibaraki) the hours or time when something happens

(dialect, Ibaraki) an hour-long period