A ticket purchased in advance to exchange for a meal (common at cafeterias, ramen shops, etc.).
入店したらまず券売機で食券を買ってください。
When you enter the shop, please buy a meal ticket at the vending machine first.
ラーメン屋は入口の券売機で食券を買うのが普通だ。
At ramen shops it's common to buy a meal ticket from the vending machine at the entrance.
学食では、食券を見せてから料理を受け取る。
In the school cafeteria, you show your meal ticket before receiving the food.
昨日、食券を忘れて学食で困ってしまった。
Yesterday I forgot my meal ticket and had trouble at the cafeteria.