Quick Definition
μαστός, οῦ, ὁ n.m. a breast, pap
Strong's Definition
from the base of 3145; a (properly, female) breast (as if kneaded up)
KJV Usage: pap
UBS Dictionary of the Greek New Testament
noun, m. | -οῦ
8.37 · Body, Body Parts, and Body Products · Parts of the Body
breast the breast of both humans and animals, with special reference to the mammary glands In REV 1:13 the phrase πρὸς τοῖς μαστοῖς is a reference to the particular location of the gold band which went around the chest and not to the mammary glands as such. In some languages, therefore, it is often preferable to use a phrase such as ‘around his chest’ rather than trying to be more specific, for example, ‘a gold band around his chest at the location of his breasts.’
In translating LUK 11:27 it is important to use an expression which will be perfectly natural, for example, ‘the breasts that gave you milk’ or ‘the breasts from which you obtained milk.’ In some instances, however, a specific reference to breasts as the source of milk may seem somewhat vulgar, and therefore it may be better to speak of ‘happy is your mother who nursed you.’
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
μαστός, -ov, 6, (μάσσω to knead [more prob. akin to paddw, Lat. madidus, ete.; ef. Vaniéek p. 693; Curtius § 456]), fr. Soph., Hdt. down; the breast (for Ww, Job iii. 12; Cant. i. 13, etc.); plur., the breasts (nipples) of a man, Rev. i. 13 RG Tr WH [here Tdf. μασθοῖς (cf. WH. App. p- 149"), Lehm. pagfois]; breasts of a woman, Lk. xi. 27; SORT Zoe [Ματαθίας, see Marrafias. | paratodoyla, -as, 7, (ματαιολόγος), vain talking, empty talk, (Vulg. vaniloquium): 1 Tim.i.6. (Plut. mor. p. 6 f.; Porphyr. de abstin. 4, 16.)
Mounce Concise Greek Dictionary
μαστός mastos 3x
the breast, pap, Lk. 11:27; 23:29; Rev. 1:13*
Abbott-Smith Greek Lexicon
μαστός, -οῦ, ὁ,
[in LXX chiefly for שַׁד;]
the breast: pl., Lk 11:27 23:29, Re 1:13 (T, μασθοῖς; WH, App., 149; L, μαζοῖς).†
Moulton & Milligan — Vocabulary of the Greek NT
μαστός. In Sy/ 804 (= * 1170)3} (ii/A.D.) M. Julius Apellas telling the story of his cure in the Asclepieum says—iaro δέ pov καὶ τῆς δεξιᾶς χειρὸς Kal τοῦ μαστοῦ. Cf. also Aazbel 316° μάμμη] δ᾽ Εὐτυχία μασίτοὺ]ς κατεκόψατο. For the form μασθός in Rev 118 8 (cf. Lk 1197, 2339 DFG), which WH (Notes*, p. 156) regard as ‘‘ Western,” cf. the magic P Lond 12179 (jji/A.D.) (= I. p. 91) πρὸς μασθῶν σκλήρια (1. -ἰαν ἢ). See also s.v. μαζός, and cf. Winer-Schmiedel G7. p. 59.
Liddell-Scott-Jones — Greek-English Lexicon
μαστός, μαζός (mastos, mazos) — breast. μαστός, ὁ, Epic dialect, Ionic dialect μαζός, [Refs 8th c.BC+]; twice in codices of Trag., [Refs 5th c.BC+]; Doric dialect μασδός [Refs 3rd c.BC+]; later μασθός [LXX+3rd c.BC+] b, [Refs 4th c.BC+] —usage contradicts the statement of Grammars that μαζός is the man's breast, μαστός the woman's:— breast, δεξιτερὸν κατὰ μαζόν [Refs 8th c.BC+]; of men's breasts, βάλε δουρὶ στέρνον ὑπὲρ μαζοῖο [Refs 8th c.BC+]
2. more frequently of a woman's breast, μαζὸν ἀνέσχε, of Hecuba pleading with Hector, [Refs 8th c.BC+]; γυναῖκά τε θήσατο μαζόν sucked her breast,[Refs 8th c.BC+]; προσέσχε μαζόν, of the mother, [Refs 5th c.BC+]
2. b rarely of animals, udder, [Refs 3rd c.BC+]
2. c generally, of the breasts of all mammalia, [Refs 4th c.BC+]
II. metaphorically, any round, breast-shaped object:
II.1. round hill, knoll, [Refs 5th c.BC+]
II.2. round piece of wool fastened to the edge of nets, [Refs 5th c.BC+]
II.3. at Paphos, breast-shaped cup, [Refs 2nd c.AD+]