Lexical Definition

‎εὔσημος‎ eúsēmos (yoo'-say-mos) intelligible ^G:A
from ‎εὖ‎ and the base of ‎σημαίνω‎

easy to be understood.

• well indicated, i.e. (figuratively) significant

Abbott-Smith

εὔσημος, -ον (< εὖ + οῆμα, a sign) [in LXX for כֶּסֶא, Ps 80 (81):3* (-ως, Da LXX 2:19)* ;]
1. conspicuous (cf. Ps, l.c.*).
2. clear to the understanding, distinct: I Co 14:9.†

Abbott-Smith References

Liddell-Scott-Jones

εὔσημος-ος,

Doric dialect εὔσᾱμος, ον, of good signs or omens, φάσμα ναυβάταις [Refs 5th c.BC+]

__II easily known by signs, conspicuous, εὔσημοςον γὰρ οὔ μελανθάνει [τὸ πλοῖον] [Refs 5th c.BC+]; ἴχνη [Refs 4th c.BC+]; οὐκ εὔσημοςον, ὅθεν.. not easy to distinguish, [Refs]; legible, clear, ὅπως -σαμοτέρα ὑπάρχῃ ἁ ἀναγραφά [Refs 3rd c.BC+]; εὔ. γράμματα [Refs 1st c.AD+]; εὔ. προσαγόρευσις [Refs 4th c.BC+]; of sound, distinct, βοαι [Refs 5th c.BC+]; wellmarked, βραχίων [εὔσημοςος “PPetr.” 1p.54 (3rd c.BC). ">Refs 3rd c.BC+]
__II.2 clear, intelligible, λόγον εὔ. δοῦναι [NT+1st c.AD+]
__II.3 evident, τισι [Refs 1st c.BC+]
__II.4 εὔσημοςα, τά, = Latin insignia, falsa lectio for{σύσσημα}, [Refs 1st c.BC+]
__II.5 of garments, with fine edging, [Refs 2nd c.AD+]
__II adverb -μως clearly, distinctly, ἔχειν [Refs 4th c.BC+]: superlative -ότατα [Refs 1st c.AD+]

_{LSJ Scripture Refs: 1Cor.14.9}