noun
commuter pass; season ticket
A ticket for unlimited travel on a specific route or network over a set period, commonly used for commuting to work or school.
毎月、駅で定期乗車券を買っています。
I buy a commuter pass at the station every month.
A more common abbreviation for 定期乗車券, used in everyday conversation.
Compound of 定期 (fixed period) + 乗車券 (boarding ticket).