Lexical Definition

‎πρόσκαιρος‎ próskairos (pros'-kahee-ros) temporary G:A
from ‎πρός‎ and ‎καιρός‎

dur-(eth) for awhile, endure for a time, for a season, temporal.

Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
πρόσκαιρόσ temporary Matt.13.21
πρόσκαιρον temporary Heb.11.25
πρόσκαιροί temporary Mark.4.17
πρόσκαιρα temporary 2Cor.4.18

Abbott-Smith

** πρόσ-καιρος, -ον, [in LXX: IV Mac 15:2, 8, 23*;]
1. in season.
2. for a season, temporary, transient: II Co 4:18, He 11:25; of plants, short-lived: Mt 13:21, Mk 4:17.†

Abbott-Smith References

Book Refs
Matthew 13:21
Mark 4:17
2 Corinthians 4:18
Hebrews 11:25

Liddell-Scott-Jones

πρόσκαιρος, ον,

occasional, extraordinary, ἑορτή [Refs]; αἱ π. ἐπιβολαί the additional taxes, [Refs 4th c.AD+]; τὰ δημόσια τέλη κανονικά τε καὶ π. τούτων [Refs 6th c.AD+]

__2 opportune, ἐκδρομαί [Refs 1st c.AD+]; ῥῆμα [Refs 5th c.BC+]
__3 at the time, τὰ π. ἄδηλα [Refs 2nd c.AD+]
__4 πρόσκαιρον, τό, agreement having temporary validity, [Refs 6th c.AD+]
__II lasting for a time, temporary, [Refs 1st c.BC+]; π. τέρψις, opposed to ἀθάνατος, [Refs 1st c.BC+]; opposed to αἰώνιος, [NT+1st c.AD+]; transient, [NT+3rd c.AD+]. adverb -ρως[Refs 1st c.AD+]

LSJ Scripture Refs: 2Cor.4.18Matt.13.21