Quick Definition
μυριάς, άδος, ἡ n.f. a myriad, ten thousand
Strong's Definition
from 3463; a ten-thousand; by extension, a "myriad" or indefinite number
KJV Usage: ten thousand
UBS Dictionary of the Greek New Testament
noun, f. | -άδος | μυρίος
60.45 · Number · One, Two, Three, Etc. [Cardinals]
ten thousand cardinal number, where there are ten thousand instances of a countable entity
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
μυριάς, -ados, ἡ, (μυρίος), [fr. Hdt. down], Sept. for 7237 and 435; a. ten thousand: Acts xix. 19 (on which pass. see ἀργύριον, 3 fin.). b. plur. with gen. i. gq. an innumerable multitude, an unlimited number, ((like our myriads], the Lat. sercenti, Germ. Tausend): Lk. xii. 1; Acts xxi. 20; Rev. v.11 [not Rec% 7; ix. 16 [here LT δισμυριάδες, q. v.]; used simply, of innumerable hosts of angels: Heb. xii. 22 [here G LTr put a comma after μυριάσιν]; Jude 14; Deut. xxxiii. 2; Dan, vii. 10.
Mounce Concise Greek Dictionary
μυριάς myrias 8x
a myriad, ten thousand, Acts 19:19; indefinitely, a vast multitude, Lk. 12:1; Acts 21:20; Heb. 12:22; Jude 14; Rev. 5:11; 9:16*
Abbott-Smith Greek Lexicon
μυριάς, -άδος, ἡ
(< μυρίος), [in LXX chiefly for רְבָבָה;]
ten thousand, a myriad: pl., Ac 19:19, Re 5:11 9:16; hyperb., of vast numbers, Lk 12:1, Ac 21:20, He 12:22, Ju 14.†
Moulton & Milligan — Vocabulary of the Greek NT
μυριάς. For μυριάς = 10,000, as in Ac 199, it is sufficient to cite P Tebt II. 3088 (a.p. 174) (= Chrest. I. p. 376) τιμὴν βίβλου μυριάδων δύο, ‘the price of 20,000 papyrus stalks ’’ (Edd.), Ρ Amh II. 10729 (a.p. 185) κριθῆς ἀρταβῶν μυριάδων δύο, ‘620,000 artabae of barley,’ and P Oxy VIII. 111544 (A.D. 284) μυριάδας tpis καὶ ὀκτακισχιλ[ίους, “*38,000.” The sense of unlimited numbers, like our ‘‘myriads,” as in Rev 5% a/., is seen in the Christian amulet P Iand 61° (v/vi A.D.) ᾧ (sc. θεῷ) παραραστκουσιν (2. παραστήκουσιν) μύριαι μαιριάτες (1. μυριάδες) ἀγγέλωϊν : for other exx. see the editor’s note σώ 7, and cf. Moulton Egyptian Rubbish-heaps, p. 31 f.
Liddell-Scott-Jones — Greek-English Lexicon
μυριάς (murias) — myriad. μῡρῐ-άς, δος, ἡ, Attic dialect genitive plural μυριαδῶν [Refs 2nd c.AD+]:—number of [Refs]myriad, [Refs 5th c.BC+] times [Refs 3rd c.AD+]: frequently of countless numbers, [Refs 5th c.BC+]; of money (i.e. δραχμῶν), [Refs 5th c.BC+]; of corn (i.e. μεδίμνων), [Refs 5th c.BC+]; also (i.e. ἀρταβῶν), [Refs 3rd c.AD+]
II. as adjective, φύστις μ. ἀνδρῶν [Refs 5th c.BC+]