ὄναρ, τό

indecl. used only in nom, and accusative sing. (the other cases are supplied by ὄνειρος), a dream: κατ᾽ ὄ. (in later writers only), in a dream, Mat.1:20 2:12-13, 19 2:22 27:19.†

(AS)

a dream; in a dream