Quick Definition
μυρίοι, ίαι, ία Adj ten thousand, innumerable
Strong's Definition
ten thousand; by extension, innumerably many
Derivation: plural of an apparently primary word (properly, meaning very many);
KJV Usage: ten thousand
UBS Dictionary of the Greek New Testament
adjc. | -αι, -α | μυρίος
60.45 · Number · One, Two, Three, Etc. [Cardinals]
ten thousand cardinal number, where there are ten thousand instances of a countable entity
60.7 · Number · Number, Countless
very very many, innumerable, countless pertaining to what is extremely numerous It would be possible to interpret μυρίους in 1CO 4:15 as meaning literally ‘ten thousand’ (see 60.45), but the evident intent in this context is to emphasize the indefinitely large number rather than any specific quantity.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
μυρίος, -a, -ov, [fr. Hom. down]; 1. innumerable, countless, [A. V. ten thousand]: 1 Co. iv. 15; xiv. 19. 2. with the accent drawn back (cf. Brim. Ausf. Sprchl. § 70 Anm. 15, vol. i. 278; Passow s. v. fin.; [L. and 5. 5. v. III.]), μύριοι, -tat, -ta, ten thousand: Mt. xviii. 24.
Mounce Concise Greek Dictionary
μύριοι myrioi 1x
indefinitely, a great number; specifically, μύριοι, a myriad, ten thousand, Mt. 18:24*
Abbott-Smith Greek Lexicon
μυρίος, -α, -ον, numberless, countless, infinite: I Co 4:15 14:19.
As a definite numeral, in pl., μύριοι, -αι, -α, ten thousand: Mt 18:24.†
Moulton & Milligan — Vocabulary of the Greek NT
μυρίοι, which in the NT (Mt 1834 αΔ} denotes a very large, an unlimited number, is used literally = 10,000 before a collective subst. in P Petr III. 41 verso (iii/B.c.) κατὰ μυρίαν δεσμήν, ‘for 10,000 bundles”; cf. 20, τ,
Liddell-Scott-Jones — Greek-English Lexicon
μύριοι (murioi) — myriad. Related to: 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+]