I. as a Relat., sts. c. gen. loci, “τῆς πόλεως ὅπου κάλλιστον στρατοπεδεύσασθαι” Pl.R.415d, cf. Hdt.2.172 ; “ὅπου βούλοιτο τοῦ δρόμου” X.HG2.4.27 ; “ἔσθ᾽ ὅπου” in some places, A.Eu.517 (lyr.), Fr.302 : standing for the Relat. Adj., μέλη, ὅπου (i. e. ἐν οἷς) “χελιδὼν ἦν τις ἐμπεποιημένη” Ar.Av.1301 : with other Particles, “ὅκου δή” somewhere or other, Hdt.3.129 ; ὅπου ἄν wherever, with subj., IG 12.76.11, etc.; in Trag. the ἄν may be omitted, as ὅπου δ᾽ Ἀπόλλων σκαιὸς ᾖ, τίνες σοφοί; E.El.972, etc. (never in Att. Prose): c. gen., “ὅπου ἂν τύχῃ τῶν λεγομένων” Pl.Prt.342e ; “ὁπουοῦν” anywheresoever, Id.Cra.403c ; ὅπουπερ c. opt., wherever, X.Cyr.3.3.5 ; “ὅπου ποτέ” S.OC 12 ; ὁπουδάν, = ὅπου δὲ ἄν, anywhere, D.C.Fr.109.21 ; ὁπουδήποτε, = ubicumque, Dosith.p.410 K. ; “ὁπουδηποτοῦν” anywheresoever, J.Ap. 2.15.
2. in indirect questions, “ὄφρα πύθηαι πατρός, ὅπου κύθε γαῖα” Od.3.16, cf. 16.306, S.OT924, etc.: with Verbs of motion in pregnant sense, “ὅκου ἐτράπετο, οὐκέτι εἶχον εἰπεῖν” Hdt.2.119 ; “κεῖνος δ᾽ ὅπου βέβηκεν, οὐδεὶς οἶδε” S.Tr.40, v.l. in X.Cyr.3.1.37, etc.: in many passages editors have in this sense restd. ὅποι, mostly from codd. ; in repeating a question, ἡ Λακεδαίμων ποῦ 'στιν; Answ. ὅπου 'στίν; (do you ask) where it is? Ar.Nu.214 : c. gen., “εἰδότες ὅκου γῆς εἴη” Hdt.4.150, cf. Pl.R.403e.
II. the strict local sense occasionally passes into,
1. a sense involving Time or Occasion, “ὅ. τιν᾽ ἴδῃ” Thgn.922, cf. 999, X.HG3.3.6 ; “σιγᾶν θ᾽ ὅ. δεῖ καὶ λέγειν τὰ καίρια” A.Ch.582, cf. Eu.277 ; οὐκ ἔσθ᾽ ὅ. there is no case in which, i.e. in no case. S.OT448, Aj.1069, E.HF186, D.3.35 ; so ἔστιν ὅ.; as a question, Id.18.22.