illuminable,a.|ɪˈl(j)uːmɪnəb(ə)l| [ad. L. illūminābil-is, f.illūmināre: see illumine v. + -able.] Capable of being illumined or illuminated. 1730–6Bailey (folio), Illuminable, capable of being enlightened.1891H. Jones Browning 250 A drench of utter dark not illuminable by white.