closableadj.

1837 Morning Post 27 Dec. 8/3 A large door such as you see at inns, with a closeable doorway in it, lets you into the yard.

1863 Once Week 10 Oct. 424/2 The two windows..were unglazed, and closable only by heavy, massive, brown-red shutters opening on the outside.

1944 Manch. Guardian 29 Oct. 3/7 A space-heater with a closeable open fire burning continuously..would show a saving in fuel alone of £1 11s. 11d. a year.

1990 L. Martin Deficit Ending (1991) xi. 163 Apparently this was one of those suburbs that requires garages at the back rather than at the front, and requires the garages to be closable.

2014 N.Y. Rev. Bks. 19 June 46/4 Coworking spaces for freelancers..follow more informal Silicon Valley prototypes in deemphasizing strictly demarcated personal territories and hierarchical markers such as corner offices or closable doors.