the art of self-defense

to commute, to go back and forth, to ply between, to attend (school)

(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.

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

self-protection

(literary) they (about women or girls)

(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

(aviation) economy class

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