noun
student commuter pass; school season ticket
A discounted seasonal train or bus pass for students commuting to school. Often abbreviated to 通学定期券 in formal contexts.
毎月、通学定期を買っています。
I buy a student commuter pass every month.
通学定期があれば、通学がずいぶん楽
With a student commuter pass, commuting to school becomes much easier.