Lexical Definition

‎ἀγοραῖος‎ agoraîos (ag-or-ah'-yos) of the marketplace ^G:A
from ‎ἀγορά‎

baser sort, low.

• relating to the market-place, i.e. forensic (times)
• by implication, vulgar

Abbott-Smith

* ἀγοραῖος, -ον (< ἀγορά),

1. frequenting the ἀγορά, a lounger in the ἀγορά (Xen., al.): Ac 17:5.
2. In late writers (Strab., al.), proper to the ἀγορά: ἀγοραῖοι (sc. ἥμεραι) ἀγονται (cf. Lat. conventus agere), court-days are kept, Ac 19:38 (for exx. of both usages, v. MM, VGT, s.v.).†

Abbott-Smith References

Liddell-Scott-Jones

ἀγοραῖος [ᾰγ], ον,

(feminine -αία epithet of Artemis and Athena, see below):— in, of, or belonging to the ἀγορά, Ζεὺς Ἀ. as guardian of popular assemblies, [Refs 5th c.BC+]; Ἑρμῆς Ἀ. as patron of traffic, [Refs 5th c.BC+]; Ἄρτεμις Ἀ. at Olympia, [Refs]; Ἀθηνᾶ Ἀ. at Sparta, [Refs 4th c.BC+]

__2 of things, τὰ ἀ. details of market-business, [Refs 5th c.BC+]
__II frequenting the market, ὁ ἀ. ὄχλος[Refs 5th c.BC+] —ἀγοραῖοι (with or without ἄνθρωποι), οἱ, those who frequented the ἀγορά, [Refs 5th c.BC+]; opposed to ἔμποροι, [Refs 5th c.BC+], but = traders (i.e. sutlers), [Refs 2nd c.AD+]:—hence, the common sort, low fellows, [Refs 5th c.BC+]; of agitators, [NT+1st c.AD+]: comparative, the baser sort, [Refs 1st c.BC+]. adverb -αίως, λέγειν[Refs 1st c.BC+]
__II.2 of things, vulgar, σκώμματα[Refs 5th c.BC+]; ἀ. φιλία (opposed to ἐλευθέριος) [Refs 4th c.BC+]; common, ἄρτοι[Refs 2nd c.AD+]
__III generally, proper to the ἀγορά, skilled in, suited for forensic speaking, [Refs 1st c.AD+] —ἀγοραος (i.e. ἡμέρα) court-day, assize, τὰς ἀ. ποιεῖσθαι[Refs 1st c.BC+]; ἄγειν τὴν ἀ. Epist. Galb. cited in [NT+1st c.AD+]adverb -ως in forensic style, [Refs 1st c.AD+]
__III.2 ἀγοραῖος, ὁ, = tabellio, notary, [Refs 2nd c.AD+]; also, pleader, advocate, in plural, [Refs 2nd c.AD+]
__III.2.b ἀγοραῖος, ἡ, market-day, [Refs] vulgar, ἀγοραῖος public speaker, drawn by [Refs 5th c.AD+]

_{LSJ Scripture Refs: Acts.17.5 ☩ Acts.19.38}