A ticket or voucher that can be exchanged for food. / (idiomatic) Someone or something that provides income or livelihood, especially as an exploited source.

meal ticket

plural of ticket office

(travel) A ticket entitling the holder to travel in one direction to a destination.

(travel, aviation) A conventional airline ticket, consisting of a coupon for each flight together with other administration coupons.

Alternative spelling of through-ticketing

plural of ticket inspector

A slip of paper drawn in a lottery, possibly redeemable for a prize.

(UK, law, obsolete) A certificate given to one who prosecutes a felon to conviction, exempting them from certain parish and ward offices.

(travel) a code on airline tickets to indicate what type of discount is applied, such as for a child or infant, or airline employee.