Lexical Definition

‎πού‎ poú (poo) somewhere ^G:ADV
genitive case of an indefinite pronoun (some) otherwise obsolete (compare ‎πόσος‎)

about, a certain place.

• as adverb of place, somewhere, i.e. nearly

Abbott-Smith

πού, enclitic particle,
1. anywhere, somewhere: He 2:6 4:4.
2. in some degree, perhaps, about: Ac 27:29 (T, μήπου), Ro 4:19; δή που (T, δήπου), surely: He 2:16.†

Abbott-Smith References

Liddell-Scott-Jones

πού,

Ionic dialect κου, Aeolic dialect ποι [Refs 7th c.BC+]:—enclitic adverb anywhere, somewhere, [Refs 8th c.BC+]; frequently with other Advs. of Place, οὐχ ἑκάς π. somewhere not far off, [Refs 5th c.BC+]; π. πέραν τοῦ ποταμοῦ [Refs 5th c.BC+] in some part there of the fields, [Refs 8th c.BC+]; ἐμβαλεῖν π. (perhaps ποι) τῆς χώρας some part of the country, [Refs 5th c.BC+]

__II without reference to Place, in some degree, καί πού τι [Refs 5th c.BC+]: frequently to qualify an expression, perhaps, I suppose, [Refs 8th c.BC+]; added to introductory Particles, οὕτω π... [Refs 8th c.BC+]; ἤν π., εἰ μή π., [Refs 5th c.BC+]: attached to single words to limit their significance, πάντως κ. [Refs 5th c.BC+]; τί π. δράσει; what in the world? [Refs 5th c.BC+]; with numerals, ἔτεα τρία καὶ δέκα κ. μάλιστα about thirteen years, [πού">Refs 5th c.BC+] denies with indignation or wonder, surely it cannot be.., οὔ τί π. οὗτος Ἀπόλλων [Refs 5th c.BC+]; οὐ δήπού adds a shade of suspicion, οὐ δήπού Στράτω; [Refs 5th c.BC+]: for δήπού, ἦπού, (see entry).—In late writers [πού">LXX+NT+2nd c.AD+] take the place of ποῖ, ποι, with Verbs of motion, as in Engl. where for whither? This idiom (condemned by [Refs 2nd c.AD+] is found occasionally in early authors, ποῦ τοι ἀπειλαὶ οἴχοντα; [πού 5th c.BC: Antipho Orator 2.4.8; ἰόντα πού 5th-6th c.BC: Xenophon Historicus “Institutio Cyri (Cyropaedia)” 1.2.16 ">Refs 8th c.BC+]; but in pure Attic dialect only as falsa lectio for{ποῖ},{ποι}.

_{LSJ Scripture Refs: LXX.Josh.2.5 ☩ John.7.35}