Quick Definition
I spy out, plot against
Strong's Definition
to be a sentinel, i.e. to inspect insidiously
Derivation: from G2685 (κατάσκοπος);
KJV Usage: spy out
Thayer's Greek Lexicon
κατασκοπέω, κατασκόπω: 1 aorist infinitive κατασκοπῆσαι; to inspect, view closely, in order to spy out and plot against: τί, Gal_2:4; (of a reconnoitre or treacherous examination, 2Sa_10:3; Jos_2:2; 1Ch_19:3; Euripides, Hel. 1607 (1623); so used, especially in middle, in the other Greek writings from Xenophon down).
Mounce Concise Greek Dictionary
κατασκοπέω kataskopeō 1x
to view closely and accurately; to spy out, Gal_2:4
Abbott-Smith Greek Lexicon
κατα -σκοπέω , -ῶ ,
[in LXX : 2Ki_10:3 , 1Ch_19:3 ( H7270 pi .), 1Ma_5:38 (A) * ;]
to view closely, inspect, spy out: c . acc , Gal_2:4 .†
Moulton & Milligan — Vocabulary of the Greek NT
κατασκοπέω [page 332]
P Oxy XII. 1414 .4 (A.D. 270 5) ὁ πρύτανις εἶπ (εν )· τὴ ]ν̣ τ̣οῦ ἱεροῦ γραφ [ὴ ]ν κ [ατ ]εσκέψασθαι καὶ ὅρον δεδώκατε , the prytanis said, You examined the list of the temple and fixed a limit. It may be added that W. Schubart (see Deissmann LAE p. 178 n. .11 ) proposes to read κατ [ε ]σκοπούμην for Deissmann s restoration α̣ἰδ [υ ]σ̣οπο̣[ύ ]μην in BGU III. 846 .8 (ii/A.D.) (= Selections , p. 94), but the meaning is then far from clear. For the form κατασκοπεύω , as in the LXX ( Exo_2:4 al. ), cf. P Tebt I. 230 (late ii/B.C.), and see Anz Subsidia p. 379.
Liddell-Scott — Intermediate Greek Lexicon
κατασκοπέω f -σκέψομαι aor1 -εσκεψάμην "to view closely, spy out", Eur. : "to reconnoitre", Xen. :— also in Mid., id=Xen.
STEPBible — Tyndale Abridged Greek Lexicon
κατα-σκοπέω, -ῶ
[in LXX: 4Ki.10:3, 1Ch.19:3 (רָגַל pi.), 1Ma.5:38 (A)* ;]
to view closely, inspect, spy out: with accusative, Gal.2:4.†
(AS)