/ rɪˈtɜːnəbl; NAmE -tɜːrn-/ adjective
1.
( formal ) that can or must be given back after a period of time :
A returnable deposit is payable on arrival.
The application form is returnable not later than 7th June.
2.
( of bottles and containers ) that can be taken back to a shop / store in order to be used again
OPP non-returnable