consecrate, separate(-ing, self)

Boyd’s Bible Dictionary:

(together sacred). The tribe of Levi consecrated to the priesthood (Ex. 32:28-2928And the children of Levi did according to the word of Moses: and there fell of the people that day about three thousand men. 29For Moses had said, Consecrate yourselves to day to the Lord, even every man upon his son, and upon his brother; that he may bestow upon you a blessing this day. (Exodus 32:28‑29); Lev. 7:3737This is the law of the burnt offering, of the meat offering, and of the sin offering, and of the trespass offering, and of the consecrations, and of the sacrifice of the peace offerings; (Leviticus 7:37)). Consecrate vessels (Josh. 6:1919But all the silver, and gold, and vessels of brass and iron, are consecrated unto the Lord: they shall come into the treasury of the Lord. (Joshua 6:19)); profits (Mic. 4:1313Arise and thresh, O daughter of Zion: for I will make thine horn iron, and I will make thy hoofs brass: and thou shalt beat in pieces many people: and I will consecrate their gain unto the Lord, and their substance unto the Lord of the whole earth. (Micah 4:13)); fields (Lev. 27:2828Notwithstanding no devoted thing, that a man shall devote unto the Lord of all that he hath, both of man and beast, and of the field of his possession, shall be sold or redeemed: every devoted thing is most holy unto the Lord. (Leviticus 27:28)); cattle (2 Chron. 29:3333And the consecrated things were six hundred oxen and three thousand sheep. (2 Chronicles 29:33)); persons (Num. 6:9-139And if any man die very suddenly by him, and he hath defiled the head of his consecration; then he shall shave his head in the day of his cleansing, on the seventh day shall he shave it. 10And on the eighth day he shall bring two turtles, or two young pigeons, to the priest, to the door of the tabernacle of the congregation: 11And the priest shall offer the one for a sin offering, and the other for a burnt offering, and make an atonement for him, for that he sinned by the dead, and shall hallow his head that same day. 12And he shall consecrate unto the Lord the days of his separation, and shall bring a lamb of the first year for a trespass offering: but the days that were before shall be lost, because his separation was defiled. 13And this is the law of the Nazarite, when the days of his separation are fulfilled: he shall be brought unto the door of the tabernacle of the congregation: (Numbers 6:9‑13)); nations (Ex. 19:66And ye shall be unto me a kingdom of priests, and an holy nation. These are the words which thou shalt speak unto the children of Israel. (Exodus 19:6)).

Concise Bible Dictionary:

This principally refers to the consecration of Aaron and his sons to the priestly office, which is given in detail in Exodus 29 and Leviticus 8. They were washed, clothed, and anointed with oil. One bullock was offered for a sin offering, and one ram for a burnt offering; another ram was offered, and this ram is called “the ram of consecration:” its blood was put upon the right ear, the thumb of the right hand, and the great toe of the right foot. Aaron and his sons were sprinkled with blood and anointed with oil. Parts of the ram were placed in the hands of Aaron and his sons, these were waved before the Lord, and then burnt on the altar upon the burnt offering. The breast of the ram was also waved before the Lord and was for Moses. Aaron and his sons ate of the flesh and other consecrations at the door of the Tabernacle.
The words mostly used for “to consecrate” are mala yad, which signify “to fill the hand” (as often rendered in the margin), doubtless alluding to their taking portions of the ram into their hands and waving them before Jehovah. Their hands being filled with offerings was suited to their character as priests to God. All was typical of believers being cleansed by water, sprinkled with blood, and anointed with oil: entirely consecrated to God, and constituted a priestly company for worship in the holiest.

Strong’s Dictionary of Hebrew Words:

Number:
5144 (find all occurrences in KJV Bible)
Transliteration:
nazar
Phonic:
naw-zar’
Meaning:
a primitive root; to hold aloof, i.e. (intransitivey) abstain (from food and drink, from impurity, and even from divine worship (i.e. apostatize)); specifically, to set apart (to sacred purposes), i.e. devote
KJV Usage:
consecrate, separate(-ing, self)