A.dream, vision in sleep, opp. a waking vision, “οὐκ ὄ., ἀλλ᾽ ὕπαρ ἐσθλόν” Od.19.547, cf. 20.90 ; “ἡλίῳ δείκνυσι τοὔναρ” S.El.425 ; “εἶδον ὄ.” Ar.Eq.1090 ; ἄκουε δὴ ὄ. ἀντὶ ὀνείρατος dream for dream, Pl.Tht.201d ; ὥστε μηδὲ ὄ. ἰδεῖν, of profound sleep, Id.Ap. 40d : prov., τὸ ἐμόν γ᾽ ἐμοὶ λέγεις ὄ. 'you are telling me what I know already', Id.R.563d, cf. Suid. s.v. ταὐτὸν πέπονθα (cf. “ὄνειρος” 1, ὄνειαρ II).
2. prov. of anything fleeting or unreal, “ὀλιγοχρόνιον . . ὥσπερ ὄ.” Thgn.1020 ; “σε παρέρχεται ὡς ὄ. ἥβη” Theoc.27.8 ; “πόθος δέ μοι ὡς ὄ. ἔπτα” Bion 1.58 : in Prose, “ἡ ἐμὴ [σοφία] . . , ὥσπερ ὄ. οὖσα” Pl. Smp.175e, cf. Men.85c ; “ὡς ὄ. ἐλευθερίας ὁρῶντας” Plu.Thes.32 ; and without “ὡς, σκιᾶς ὄ. ἄνθρωπος” Pi.P.8.95 ; ὄ. ἡμερόφαντον ἀλαίνει, of an old man, A.Ag.82 (anap.).
II. in Trag. and Att. freq. as Adv., in a dream, in sleep, “ὄ. γὰρ ὑμᾶς νῦν Κλυταιμνήστρα καλῶ” Id.Eu.116 ; ὄ. διώκεις θῆρα ib.131 ; “ὄ. πνεύσαντα νυκτός” S.Fr.65 : freq. in Pl., “ὄ. ἐπλουτήσαμεν” Tht.208b ; ὄ. ὀνείρατα διηγεῖσθαι ib.158c, etc. ; also οὐδ᾽ ὄ. not even in a dream, E.Fr.107, Herod.1.11 ; “πολιτικὸς ἀνὴρ οὐδ᾽ ὄ.” Cic.Att.1.18.6 ; μηδ᾽ ἰδὼν ὄ. not even in my dreams, E.IT518, cf. Pl. Tht.173d, Mosch.4.18 ; “ἃ μηδ᾽ ὄ. ἤλπισαν” D.19.275 : hence freq. opp. ὕπαρ, v. ὕπαρ 11 ; κατ᾽ ὄναρ in a dream, condemned by Phryn.395, but quoted by him from Polemo, is also found in Ev.Matt.1.20, Aristid. Or.47(23).21 : with sense, in consequence of a dream, in SIG1147 (Crete, ii/iii A. D.), Supp.Epigr.2.405 (Macedonia).