Quick Definition
the sea, the deep
Strong's Definition
deep or open sea, i.e. the main
Derivation: of uncertain affinity;
KJV Usage: depth, sea
Thayer's Greek Lexicon
πέλαγος, πελαγους, τό (by some (e. g. Lob. Pathol. Proleg., p. 805) connected with παξ, i. e. the 'flat' expanse (cf. Latinaequor); but by Curtius, § 367, et al. (cf. Vanicek, p. 515) with πλήσσω, i. e. the 'beating' waves (cf. our 'plash')), from Homer down;
a. properly, the sea i. e. the high sea, the deep (where ships sail; accordingly but a part of the sea, θάλασσα, Aristotle, Probl. sect. 23 quaest. 3 (p. 931{b} , 14f) ἐν τῷ λιμενι ὀλίγη ἐστιν ἡ θάλασσα, ἐν δέ τῷ πελάγει βαθεῖα. Hence) τό πέλαγος τῆς θαλάσσης,aequor maris (A. V. the depth of the sea; cf. Trench, § xiii.), Mat_18:6 (so too Apollonius Rhodius, 2, 608; πέλαγος αἰγαιας ἁλός, Euripides, Tro. 88; Hesychius πέλαγος ... βυθός, πλάτος θαλάσσης. Cf. Winers Grammar, 611 (568); (Trench, as above)).
b. universally, the sea: τό πέλαγος τό κατά τήν Κιλικίαν, Act_27:5 (see examples from Greek authors in Passow, under the word πέλαγος, 1; (Liddell and Scott, under I.)).
Mounce Concise Greek Dictionary
πέλαγος pelagos 2x
the deep, the open sea, Mat_18:6 ;
a sea, distinguished from the sea in general, and named from an adjacent country, Act_27:5
Abbott-Smith Greek Lexicon
** πέλαγος , -ους , τό ,
[in LXX : 2Ma_5:21 , 4Ma_7:1 * ;]
the deep sea, the deep, the sea: Act_27:5 ; τὸ Papyri τῆς θαλάσσης , Mat_18:6 .
SYN.: θαλάσσα G2281 ( q.v. ); and cf. ἄβυσσος G12 .
Moulton & Milligan — Vocabulary of the Greek NT
πέλαγος [page 502]
For πέλαγος , the open sea (note the conjunction with θάλασσα in Mat_18:6 ), see OGIS 74 .3 (B.C. 247 221) Θεύδοτος Δωρίωνος Ἰουδαῖος σωθεὶς ἐκ πελ (άγ )ους , and cf. ib. 69 .4 ff. σωθεὶς ἐγ μεγάλων κινδύνων ἐκπλεύσας ἐκ τῆς Ἐρυθρᾶς θαλάσσης . The adj. πελάγιος occurs in the sailor s song P Oxy XI. 1383 (late iii/A.D.) where the 2nd column begins
Ῥοδίοις ἐκέλευον ἀνέμοις καὶ μέρε̣σι τ̣οῖς πελαγίοις ,
ὅτε πλέειν ἤθελον ἐγώ ,
I commanded the Rhodian winds and the seaward parts when I wished to sail.
Liddell-Scott — Intermediate Greek Lexicon
πέλαγος πέλα^γος, ος, εος, τό, "the sea", esp. "the high sea, open sea, the main", Lat. pelagus, Hom. , etc.; joined with other words denoting "sea", ἁλὸς ἐν πελάγεσσιν (cf. "aequora ponti)", Od. ; πόντιον π. or πόντου π., Pind. ; ἅλς πελαγία Aesch. ; ἅλιον π. Eur. : often of parts of the sea (θάλασσα), Αἰγαῖον π. Aesch. ; ἐκ μεγάλων πελαγῶν, τοῦ τε Τυρσηνικοῦ καὶ τοῦ Σικελιοῦ Thuc. metaph., of any vast quantity, π. κακῶν a ""sea" of troubles, " Aesch. ; π. δύης id=Aesch. ; εἰς τὸ π. τῶν λόγων Plat. ; also of great difficulties, Soph.
STEPBible — Tyndale Abridged Greek Lexicon
πέλαγος, -ους, τό
[in LXX: 2Ma.5:21, 4Ma.7:1 * ;]
the deep sea, the deep, the sea: Act.27:5; τὸ π. τῆς θαλάσσης, Mat.18:6
SYN.: θαλάσσα (which see); and cf. ἄβυσσος (AS)