A.form, “ἰδέᾳ καλός” Pi.O.10(11).103, cf. Theoc.29.6; “τὴν ἰ. πάνυ καλός” Pl.Prt.315e; “τὴν ἰ. μοχθηρός” And.1.100, cf. Ar.Av.1000; “ἰδέην ὁρέων” Hdt.1.80; opp. χρῶμα, Id.4.109; opp. μέγεθος, Pl.Phd.109b (pl.); “ἡ ἰ. αὐτοῦ ἦν ὡς ἀστραπή” Ev.Matt.28.3, etc.; of the elementary shapes, “ἄτομοι ἰδέαι” Democr. ap.Plu.2.1111a codd., cf. Fr.141 D.; of the four elements, Philistion ap.Anon.Lond.20.25.
3. kind, sort, “φύλλα τοιῆσδε ἰδέης” Hdt.1.203; φύσιν παρέχονται ἰδέης τοιήνδε [οἱ ποτάμιοι ἵπποι] Id.2.71; ἐφρόνεον διφασίας ἰ. they conceived two modes of acting, Id.6.100, cf. 119; τὰ ὄργι᾽ ἐστὶ τίν᾽ ἰ. ἔχοντά σοι; what is their nature or fashion? E.Ba.471; ἑτέραν ὕμνων ἰ. Ar.Ra.384; καινὰς ἰ. εἰσφέρειν new forms of comedy, Id.Nu. 547; τίς ἰ. βουλεύματος; Id.Av.993; πᾶσα ἰ. θανάτου every form of death, or death in every form, Th.3.81, cf. 83, 2.51; “πολλαὶ ἰ. πολέμων” Id.1.109; “ἡ ὑπάρχουσα ἰ. τῆς παρασκευῆς” Id.4.55; πᾶσαν ἰδέαν πειράσαντες having tried every way, Id.2.19; τῇ αὐτῇ ἰ. Id.3.62, 6.76; οὐκ ἐν ταῖς αὐταῖς ἰ. not in the same relations, Isoc.3.44: εἰς μίαν τινὰ ἰ. into one kind of existence, Pl.Tht.184d; “ἄλλη ἰ. πολιτείας” Id.R.544c, etc.; “ἀγοραίας . . ἰδέας τοῦ βίου” Epicur.Fr.196.
4. esp. in Rhet., etc., of literary form, “ἀμφοτέραις ταῖς ἰδέαις κατεχρήσαντο πρὸς τὴν ποίησιν” Isoc.2.48, cf. 15.47,183; ἡ ἰαμβικὴ ἰ. Arist. Po.1449b8, cf. 1450b34, Rh.Al.1425a9, etc.; ἡ ἐν τῷ λέγειν ἰ. Phld. Rh.2.258 S.
b. style, Πλατωνική, Δημοσθενικὴ ἰ., Syrian.in Hermog. 1.112 R.
II. in Logic,= εἶδος, class, kind: hence, principle of classification, “ἔφησθα . . μιᾷ ἰδέᾳ τά τε ἀνόσια ἀνόσια εἶναι καὶ τὰ ὅσια ὅσια” Pl.Euthphr.6d, cf. Phdr.265d. Sph.253d, etc.
2. pl. in Platonic Philosophy, ideal forms, archetypes, “τὰς . . ἰ. νοεῖσθαι μέν, ὁρᾶσθαι δ᾽ οὔ” Id.R.507b, cf. 596b,al., Arist.Metaph.990a34, al., EN1096a17: also in sg., ἡ τοῦ ἀγαθοῦ ἰ. Pl.R.508e, al., cf. εἶδος.
3. notion, idea, “προάγειν τὸν ἀποκρινόμενον ἐπὶ τὴν ἰ. ἀγνοουμένου πράγματος” Nausiph.2. (Written εἰδέα in later Greek, as PGen.16.17 (iii A.D.), v.l. in Ev.Matt.28.3.)