cleithral,a.Greek Archit.|ˈklaɪθrəl| [f.Gr. κλεῖθρ-ον bar for closing, pl. lattice (f. κλεί-ειν to close) + -al1.] Of a temple: Having a roof, covered in: opposed to hypæthral. 1850in Weale Dict. Terms.1867Ashpitel Archit. 307 A Greek Doric hexastyle, peripteral, and cleithral temple.