lockable

adj

1. (not-comparable)Capable of being locked.

   “A desk for personal use with a file drawer that can be locked or a separate lockable file are ^([sic]) also a necessity.”

   “Because we would be away from the car for an hour or more and because the carrier, though zippable, was not lockable and, in any event, was slashable, we put all the suitcases, etc., in the car with us while we drove downtown from the motel.”