Lexical Definition

‎ἀριθμός‎ arithmós (ar-ith-mos') number ^G:N-M
from ‎αἴρω‎

number.

• a number (as reckoned up)

Abbott-Smith

ἀριθμός, -οῦ, ὁ, [in LXX chiefly for מִסְפָּר;]
number, a number: Lk 22:3, Jo 6:10, Ac 4:4 5:36 6:7 11:21 16:5, Ro 9:27, Re 5:11 7:4 9:16 13:17, 18 15:2 20:8 (for exx. of mystical use in π., v. MM, s.v.).†

Abbott-Smith References

Liddell-Scott-Jones

ἀριθμός [ᾰ],

(ἁρ-[Refs], ὁ, number, first in [Refs 8th c.BC+]; πλῆθος ἐς ἀ. the amount in point of number,[Refs 5th c.BC+] 'count the pebbles on the shore', [Refs 5th c.BC+]; οὐ γιγνώσκων ψήφων ἀριθμούς, of a blockhead, [Refs 4th c.BC+]

__2 amount, sum, πολὺς ἀ. χρόνου[Refs 5th c.BC+]; ἀ. [χρυσίου] a sum of money, [Refs]
__3 ἀριθμῷ, absolutely, in certain numbers, [Refs 5th c.BC+]by tale, [Refs 5th c.BC+]
__4 item or term in a series, ὁ δεύτερος ἀ.[Refs 5th c.BC+]; τοὺς ἀ. τοῦ σώματος points of the body, [Refs 5th c.BC+]: hence as a mark of completeness, πάντας τοὺς ἀ. περιλαβών[Refs 5th c.BC+]; τοῦ καθήκοντος τοὺς ἀριθμούς the sum total of duty, [Refs 2nd c.AD+]
__5 number, account, as a mark of station, worth, rank, μετ᾽ ἀνδρῶν ἵζει ἀριθμῷ takes his place among men, [Refs 8th c.BC+]; ξενίας ἀριθμῷ πρῶτ᾽ ἔχειν ἐμῶν φίλων in regard of friendship, [Refs]; δειλοὶ γὰρ ἄνδρες οὐκ ἔχουσιν ἐν μάχῃ ἀριθμόν have no account made of them, [Refs]; οὐδ᾽ εἰς ἀ. ἥκει λόγων she comes not into my account, [Refs 3rd c.BC+]
__6 mere number, quantity, opposed to quality, ταῦτ᾽ οὐκ ἀ. ἐστιν, ὦ πάτερ, λόγων a mere set of words, [Refs 5th c.BC+]; of men, οὐκ ἀ. ἄλλως not a mere lot, [ἀριθμός, πρόβατ᾽ ἄλλως 5th-6th c.BC: Aristophanes Comicus “Nubes” 1203">Refs 5th c.BC+]; sometimes even of a single man, οὐκ ἀριθμὸν ἀλλ᾽ ἐτητύμως ἄνδρ᾽ ὄντα not a mere unit, [Refs 5th c.BC+]; also ἀριθμὸν πληροῦν to be a mere cipher, [Refs 6th c.AD+]
__II numbering, counting, μάσσων ἀριθμοῦ past counting, [Refs 5th c.BC+]; especially in phrases, ἀ. ποιεῖσθαι τῶν νεῶν to hold a muster of.., [Refs 5th c.BC+] can be stated in numbers, [Refs 5th c.BC+]
__III the science of numbers, arithmetic, ἀριθμόν, ἔξοχον σοφισμάτων[Refs 5th c.BC+]
__IV in Philos., abstract number, [Refs 4th c.BC+]; ἀ. οὐσιώδης, opposed to τοῦ ποσοῦ, [Refs 3rd c.AD+]; ἀ. ἑνιαῖος, οὐσιώδης, ἑτεροῖος, [Refs 5th c.AD+]
__V Grammars, number, [Refs 2nd c.BC+]; compare ἑνικός, δυικός, πληθυντικός.
__VI numeral, [Refs], etc.; ὁ τέσσαρα ἀ.[Refs 2nd c.AD+]; παιδὸς ἀ., ={δεκάτη}, [Refs 5th c.BC+]
__VII unknown quantity (x), defined as πλῆθος μονάδων ἀορίστων, [Refs 3rd c.AD+]
__VIII Rhet., rhythm in Prose, in plural, [Refs 4th c.BC+]
__IX line of a book, [Refs 2nd c.AD+]
__X sum of numerical values of letters in a name, [NT]; φιλῶ ἧς ἀριθμὸς φμέ Pompeian Inscription in [Refs]
__XI unit of troops, = Latin numerus, [Refs 6th c.AD+]; = legio, [Refs 4th c.AD+]ad Ath.280d, [Refs 1st c.BC+]
__XII Astrology texts, mostly in plural, degrees traversed in a given time, [Refs 2nd c.AD+]; τοῖς ἰδίοις ἀ. at her normal speed, of the moon, [Refs 2nd c.AD+]; also of degrees of latitude, [Refs 4th c.AD+]
__XIII in Medicine texts, in plural, precise conditions, παρόντων τῶν πρὸς τὴν φλεβοτομίαν ἀριθμῶν Herod.middle in [Refs 5th c.BC+]

_{LSJ Scripture Refs: Rev.13.17}