EarnestA pledge.Now he which stablisheth us with you in Christ, and hath anointed us, is God; who hath also sealed us, and given the EARNEST of the Spirit in our hearts. ( 2 Corinthians 1:1 Genesis 1:21-22 ) Source: A King James Dictionary. (Used with permission. Copyright © Philip P. Kapusta) Bibliography Information"Entry for 'Earnest'". A King James Dictionary.