Lexical Definition

‎ἑδραῖος‎ hedraîos (hed-rah'-yos) steadfast G:A
from a derivative of (to sit)

settled, stedfast.

Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
ἑδραῖοσ firm 1Cor.7.37
ἑδραῖοι firm Col.1.23
steadfast 1Cor.15.58

Abbott-Smith

**ἑδραῖος, -ον (< ἕδρα, a seat), [in Sm.: Ps 32 (33):14*, al. ;]

1. sitting, seated.
2. steadfast, firm; metaph., of moral fixity: I Co 7:37 15:58, Col 1:23.†

Abbott-Smith References

Book Refs
Psalms 32:14*
1 Corinthians 7:37 · 15:58
Colossians 1:23

Liddell-Scott-Jones

ἑδραῖος, α, ον,

also ος, ον [Refs 5th c.BC+]:— sitting, sedentary, of persons or their occupations, ἔργον [Refs 5th c.BC+]; . ἀρχαί, opposed to στρατεῖαι, [Refs 5th c.BC+]

__2 ἑδραία ῥάχις the horse's back on which the rider sits, [Refs 5th c.BC+]
__II steady, steadfast, κάθησ᾽ ἑδραία [Refs 5th c.BC+]; . ὕπνος sound sleep, [Refs 5th c.BC+]; of a cup, [Refs 2nd c.AD+]: metaphorically in Rhet., firmly based, κατάληξις [Refs 4th c.BC+]. adverb -αίως firmly, [Refs 2nd c.BC+]; steadily, [Refs 5th c.AD+]
__II.2 permanently appointed, [Refs 6th c.AD+]