Quick Definition
ἄστρον, ου, τό n.n. a star
Strong's Definition
properly, a constellation; put for a single star (natural or artificial)
Derivation: neuter from G792 (ἀστήρ);
KJV Usage: star
UBS Dictionary of the Greek New Testament
noun, n. | -ου | ἀστήρ
1.30 · Geographical Objects and Features · Heavenly Bodies
star, planet a star or a planet In selecting a term for ‘star,’ it is important to avoid an expression which may relate to only one set of stars, that is to say, a particular constellation, since there may be connotations associated with such a constellation which can radically alter the intent of a particular passage. Some constellations, for example, may be regarded as kindly disposed toward mankind, while others may be regarded as hostile.
1.31 · Geographical Objects and Features · Heavenly Bodies
constellation a group of stars Normally a constellation may be described as ‘a group of stars’ or ‘a family of stars’ or ‘stars that travel together’ or even ‘stars that live together.’ It is possible, however, to interpret the occurrence of ἄστρον in ACT 7:43 as being a reference to a particular planet (namely, Saturn) rather than a constellation.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἄστρον, -ov, τό, [(see ἀστήρ init.), fr. Hom.down]; 1. a group of stars, a constellation ; but not infreq. also 2. i.q. ἀστήρ a star: Lk. xxi. 25; Acts xxvii. 20; Heb. xi. 12; the image of a star, Acts vii. 43.
Mounce Concise Greek Dictionary
ἄστρον astron 4x
a constellation; a star, Lk. 21:25; Acts 7:43; 27:20; Heb. 11:12*
Abbott-Smith Greek Lexicon
ἄστρον, -ου, τό,
[in LXX chiefly for כּוֹכָב;]
mostly in pl. (as in cl.), the stars: Lk 21:25, Ac 27:20, He 11:12;
in sing. (Xen., al.), only of some noted star; the symbol or image of a star, Ac 7:43 (cf. ἀστήρ, and v. MM, s.v.).†
Moulton & Milligan — Vocabulary of the Greek NT
ἄστρον. In P Hib I. 2731 8. (a calendar, B.c. 301-240) χρῶνt[at] ταῖς κατὰ σελήνη[ν] ἡμέραις of ἀστρολό γοι] Kal of tepoypapparelis] πρὸς τὰς δόσεις καὶ ἀ[να]τολὰς τῶν ἄστρω[ν], ‘‘the astronomers and sacred scribes use the lunar days for the settings and risings of the stars” (Edd.): cf. ὅδ δ, οὐθὲν πα[ραλἸλάσσοντες ἐπ᾽ ἄστρω[ι] ἢ Sivovre ἢ ἀνατ[έλΊλοντι, ‘‘ without alterations owing to the setting or rising of a star” (zd.). From the Adrumetum tablet (Wiinsch 4, no. 57), on which Deissmann has written in BS, pp. 271 ff., we may quote ὁρκίζω oe τὸν φωστῆρα καὶ ἄστρα ἐν οὐρανῷ ποιήσαντα διὰ φωνῆς προστάγματος. Deissmann compared Gen 115: ; since there we have ἀστέρας, the substitution of ἄστρα suggests the suspicion that the simpler 2nd dec]. noun was beginning to be preferred in the vernacular. (Both, however, figure in MGr, and ἀστήρ is more often found in NT.) Add P Grenf.I. 18 (literary—ii/B.C.), ἄστρα φίλα Kal συνερῶσα πότνια νύξ μοι, P Oxy IV. γ315 (A.D. 8-9) καὶ τοῖς ἄστροις Ἥρας τρῖς, ‘*three days at the time of the stars of Hera’”’ (Edd., who note that the ‘‘star of Hera”? was Venus, but the plural is unexplained), Sy/Z 686% (early ii/A.D.) μέχρι νυκτός, ὡς ἄστρα καταλαβεῖν, διεκαρτέρησε, of a competitor in the pancration, OG/S 56%* (B.c. 239-8), τὸ ἄστρον τὸ τῆς Ἴσιος, 7. 6. Sirius, the date of whose heliacal rising is defined in the succeeding lines. This last passage agrees with the NT in making ἄστρον a complete equivalent of ἀστήρ. It is MGr ἄστρο.
Liddell-Scott-Jones — Greek-English Lexicon
ἄστρον (astron) — star. ἄστρον, τό, mostly in plural, the stars, [Refs 8th c.BC+]; τοῦ κατ᾽ ἄστρα Ζηνός, ={τοῦ ἐν οὐρανῷ}, [Refs 5th c.BC+]; ἄστρων εὐφρόνη, ={εὐφρ. ἀστερόεσσα}, [Refs] probable reading in [Refs 7th c.BC+]; περὶ τὸ ἄ. in the dog-days, [Refs 5th c.BC+]; poetry of the sun, [Refs 5th c.BC+]: seldom of any common star, [Refs 4th c.BC+]; of the fixed stars, [Refs 4th c.BC+]; ἄστρα πλανητά, opposed to ἀπλανῆ, [Refs 5th c.BC+]; opposed to ἐνδεδεμένα, [Refs 4th c.BC+]; opposed to ἀστέρες, [Refs 2nd c.AD+]; ἐπὶ τοῖς ἄστροις at the times of the stars' rising or setting, [Refs 5th c.BC+]; ἄστροις σημαίνεσθαι, τεκμαίρεσθαι, guide oneself by the stars, [Refs 2nd c.AD+]; ἄστροις τὸ λοιπὸν ἐκμετρούμενος χθόνα knowing its place only by the stars, [Refs 5th c.BC+]
II. of something brilliant, admirable, Ἀκροκόρινθον Ἑλλάδος ἄ.[Refs 3rd c.BC+]