Dictionary of Biblical Words:
(See 2 Cor. 5:5.). The pledge or foretaste of all our heavenly blessings. It is the Spirit that is the earnest, and we are indwelt by Him as the earnest of our inheritance until we reach it.
Strong’s Dictionary of Greek Words:
Transliteration:
arrhabon
Meaning:
of Hebrew origin (6162); a pledge, i.e. part of the purchase-money or property given in advance as security for the rest