forgettable,a.|fəˈgɛtəb(ə)l| [f. forget v. + -able.] That may be forgotten. 1845Carlyle Cromwell (1871) I. 55 Indistinct and instantly forgettable particulars.1868M. Pattison Academ. Org. v. 184 Wasting six months in cramming up a minimum of forgetable matter.