Boyd’s Bible Dictionary:
(God is father). Second son of Aaron and Elisheba (Num. 3:2; Ex. 6:23). Ascended Sinai with Moses and the elders (Ex. 28:1). Set apart with his brothers for the priesthood. Consumed, with his brother Nadab, for offering strange fire before the Lord (Lev. 10:1-2).
Concise Bible Dictionary:
Abihu and Nadab, sons of Aaron, with seventy of the elders of Israel, were invited to ascend with Moses, where they saw God and did eat and drink (Ex. 24:1,9-11). They were consecrated to minister to the Lord as priests, yet on the first occasion of their exercising the priesthood for Israel they offered strange fire, which the Lord had not commanded, and were smitten by fire from God (Lev. 10:1-2). Immediately before this we read that “there came a fire out from before the Lord and consumed upon the altar the burnt offering and the fat.” That fire was never to go out, and doubtless the fire Abihu should have used was the fire that was upon the brazen altar, as is ordained in Leviticus 16:12. We read elsewhere that everything was to be done “as the Lord commanded Moses”; but of this which Nadab and Abihu did, it expressly says it was not commanded; therefore it was sin, and God was dishonored. Their death followed, and Aaron and his other sons were not to leave the tabernacle nor mourn for the dead (Num. 26:60-61; 1 Chron. 24:1-2). The case of Nadab and Abihu should teach us that not every kind of worship is acceptable to God; “they that worship him must worship him in spirit and in truth” (John 4:24); mere outward worship will not do and it must be according to what God has revealed. If separated from the sacrifice of Christ it is but the energy of nature, and is offensive to God.
Strong’s Dictionary of Hebrew Words:
Transliteration:
’Abiyhuw’
Meaning:
from 1 and 1931; father (i.e. worshipper) of Him (i.e. God); Abihu, a son of Aaron
Jackson’s Dictionary of Scripture Proper Names:
my father is he, or "father of him"
Potts’ Bible Proper Names:
He is a father; father, i. e., worshiper, of Him, i. e., God:―son of Aaron, Exod. 6:23. {Ille est pater}