Apparently a primary word; the bosom; by analogy, a bay -- bosom, creek.
Thayer's Greek Lexicon
Strong's 2859: κόλπος
κόλπος, κόλπου, ὁ (apparently akin to κοῖλος hollow, (yet cf. Vanicek, p. 179; Liddell and Scott, under the word)), Hebrew חֵיק; the bosom (Latinsinus), i. e. as in the Greek writings from Homer down:
1.the front of the body between the arms hence ἀνακεῖσθαιἐντῷκόλπῳτίνος, of the one who so reclines at table that his head covers the bosom as it were, the chest, of the one next him (cf. B. D. under the word ), John 13:23. Hence the figurative expressions, ἐντοῖςκόλποις (on the plural, which occurs as early as Homer, Iliad 9, 570, cf. Winers Grammar, § 27, 3; (Buttmann, 24 (21))) τοῦἈβραάμεἶναι, to obtain the seat next to Abraham, i. e. to be partaker of the same blessedness as Abraham in paradise, Luke 16:23; ἀποφέρεσθαι ... εἰςτόνκόλπονἈβραάμ, to be borne away to the enjoyment of the same felicity with Abraham, Luke 16:22 (οὕτωγάρπαθόντας — according to another reading θανόντας — ἈβραάμκαίἸσαάκκαίἸακώβὑποδέξονταιεἰςτούςκόλπουςαὐτῶν, 4 Macc. 13:16; (see B. D. under the phrase, Abraham's bosom, and) on the rabbinical phrase אברהםשׁלבּחיקו, in Abraham's bosom, to designate bliss in paradise, cf. Lightfoot, Horace, Hebrew et Talmud., p. 851ff); ὁὤνεἰςτόνκόλποντοῦπατρός, lying (turned) unto the bosom of his father (God), i. e. in the closest and most intimate relation to the Father, John 1:18 (Winers Grammar, 415 (387)); cf. Cicero, ad div. 14,4iste vero sit in sinu semper et complexu meo.
2.the bosom of a garment, i. e. the hollow formed by the upper forepart of a rather loose garment bound by a girdle, used for keeping and carrying things (the fold or pocket; cf. B. D. under the word ) (Exodus 4:6; Proverbs 6:27); so, figuratively, μέτρονκαλόνδιδόναιεἰςτόνκόλποντίνος, to repay one liberally, Luke 6:38 (ἀποδιδόναιεἰςτόνκόλπον, Isaiah 65:6; Jeremiah 39:18 ()).
3.a bay of the sea (cf. Italiangolfo (English gulf — which may be only the modern representatives of the Greek word)): Acts 27:39.
Luke 6:38 - N-AMS GRK:εἰς τὸν κόλπον ὑμῶν ᾧ NAS: to you. They will pour into your lap a good KJV: into your bosom. For with the same INT: into the lap of you with that
Luke 16:22 - N-AMS GRK:εἰς τὸν κόλπον Ἀβραάμ ἀπέθανεν NAS: to Abraham's bosom; and the rich man KJV: Abraham's bosom: the rich man INT: into the bosom of Abraham died
Luke 16:23 - N-DMP GRK:ἐν τοῖς κόλποις αὐτοῦ NAS: away and Lazarus in his bosom. KJV: in his bosom. INT: in the bosom of him
John 1:18 - N-AMS GRK:εἰς τὸν κόλπον τοῦ πατρὸς NAS: God who is in the bosom of the Father, KJV: is in the bosom of the Father, he INT: in the bosom of the Father
John 13:23 - N-DMS GRK:ἐν τῷ κόλπῳ τοῦ Ἰησοῦ NAS: on Jesus' bosom one KJV: on Jesus' bosom one of his INT: in the bosom of Jesus
Acts 27:39 - N-AMS GRK:οὐκ ἐπεγίνωσκον κόλπον δέ τινα NAS: but they did observe a bay with a beach, KJV: a certain creek with INT: not they did recognize bay however a certain