Henry George Liddell, Robert Scott, A Greek-English Lexicon

A.Les graffites grecs du Memnonion d'Abydos No.528 : the neut. in Od.4.841, Hdt.7.14,15, A.Ch.541, 550, S.El.1390 (lyr.), E.HF517 ; and in prov., τοὐμὸν ὄ. ἐμοί 'you are telling me what I know already', Call.Epigr.34, Cic.Att.6.9.3 (cf. “ὄναρ” 1.1, ὄνειαρ II) : the forms ὀνείρου -ῳ -ων -οις leave the gender doubtful : pl. “ὄνειρα” E. HF518, AP9.234 (Crin.) ; but the form ὀνείρατα (as if from ὄνειραρ, EM47.53) is more freq. in nom. and acc., Od.20.87, etc. : also gen. “ὀνειράτων” Hdt.1.120, A.Pr.485, al., S.El.481 (lyr.) : dat. “-ασι” A.Pr. 655, Pers.176, S.OT981, E.Alc.354 : gen. sg. “-ατος” Pl.Tht.201d ; dat. sg. “ἐν τὠνείρατι” A.Ch.531 :—dream, Il.2.80, al. ; ὄνειρον ὑποκρίνεσθαι, v. ὑποκρίνω B. 1.2 ; “θέρμετε δ᾽ ὕδωρ, ὡς ἂν θεῖον ὄ. ἀποκλύσω” Ar.Ra.1340.

2. as pr. n. dream personified, Il.2.6 sqq. : also in pl., “δῆμος ὀνείρων” Od.24.12, cf. Hes.Th.212.

3. in similes or metaphors, of anything unreal or fleeting, “σκιῇ εἴκελον ἢ καὶ ὀ.” Od.11.207, cf. 222 ; τοῦ ποτε μεμνήσεσθαι ὀΐομαι ἔν περ ὀ. if only in a dream, 19.581 ; “σμικρὰ ὀνείρατα λέλειπται” faint and shadowy traces, Pl.Lg. 695c ; ὄνειρα ἀφένοιο dreams of wealth, APl.c. (Cf. ὄνοιρος.）