a. [f. FRANK v.2 + -ABLE.] That may be franked.
1811. Southey, Lett. (1856), II. 239. This is a MS. of a frankable size, which I design to employ him in transcribing for me.
1894. Columbus Disp. (Ohio), 17 Oct., 7/3. The envelopes, not containing any frankable matter.