ὄναρ only used in nom. and acc. sg., the other cases being supplied by ὄνειρος
I.a dream, vision in sleep, opp. to a waking vision (ὕπαρ), Od., Soph., etc.; ὥστε μηδ᾽ ὄναρ ἰδεῖν, to express profound sleep, Plat.
2.proverb. of anything fleeting or unreal, ὀλιγοχρόνιον ὥσπερ ὄναρ Theogn.; παρέρχεται ὡς ὄναρ ἥβη Theocr.