(be in) build(-er, -ing, up), edify, embolden

Dictionary of Biblical Words:

The “building up” of believers on their most holy faith. Any teaching or doctrine that has this tendency is to edification. The opposite to this is “destructive” (that which “pulls down”).

Concise Bible Dictionary:

As early as Genesis 4:1717And Cain knew his wife; and she conceived, and bare Enoch: and he builded a city, and called the name of the city, after the name of his son, Enoch. (Genesis 4:17) we read of Cain building a city and calling it after his son’s name; since which time building houses has become common; whereas Abraham looked for a city whose Builder is God. It is used as symbolical of raising up a spiritual edifice to God, of which Christ is the Builder (Matt. 16:1818And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. (Matthew 16:18); 1 Cor. 3:99For we are laborers together with God: ye are God's husbandry, ye are God's building. (1 Corinthians 3:9); Eph. 2:2121In whom all the building fitly framed together groweth unto an holy temple in the Lord: (Ephesians 2:21); 1 Pet. 2:55Ye also, as lively stones, are built up a spiritual house, an holy priesthood, to offer up spiritual sacrifices, acceptable to God by Jesus Christ. (1 Peter 2:5)). As instruments, others also are builders—Paul calls himself “a wise master builder,” or rather “architect” as having well laid the foundation of the assembly, which is Christ (1 Cor. 3:1010According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon. (1 Corinthians 3:10)). The laborers are cautioned as to the material they use in building up a house for God: improper materials will not stand the test of the fire, and the builders will suffer loss by seeing their work burned up and by losing their reward (1 Cor. 3:10-1410According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon. 11For other foundation can no man lay than that is laid, which is Jesus Christ. 12Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble; 13Every man's work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man's work of what sort it is. 14If any man's work abide which he hath built thereupon, he shall receive a reward. (1 Corinthians 3:10‑14)). Whereas all that Christ builds, though by the instrumentality of His servants, will surely stand forever. Under another similitude Christ is the chief corner stone, or head of the corner, which “the builders,” the heads of the Jewish nation, refused, but which God exalted (Psa. 118:2222The stone which the builders refused is become the head stone of the corner. (Psalm 118:22); Matt. 21:4242Jesus saith unto them, Did ye never read in the scriptures, The stone which the builders rejected, the same is become the head of the corner: this is the Lord's doing, and it is marvellous in our eyes? (Matthew 21:42); Acts 4:1111This is the stone which was set at nought of you builders, which is become the head of the corner. (Acts 4:11); Eph. 2:2020And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone; (Ephesians 2:20); 1 Pet. 2:77Unto you therefore which believe he is precious: but unto them which be disobedient, the stone which the builders disallowed, the same is made the head of the corner, (1 Peter 2:7)).

Strong’s Dictionary of Greek Words:

Number:
3618 (find all occurrences in KJV Bible)
Greek:
οἰκοδομέω
Transliteration:
oikodomeo
Phonic:
oy-kod-om-eh’-o
Meaning:
from the same as 3619; to be a house-builder, i.e. construct or (figuratively) confirm
KJV Usage:
(be in) build(-er, -ing, up), edify, embolden