Boyd’s Bible Dictionary:
(lawlessness). A vile, worthless person, reckless of God and man (Deut. 13:13; Judg. 19:22; 1 Sam. 2:12). Hence, Satan (2 Cor. 6:15).
Concise Bible Dictionary:
The Hebrew word signifies “worthless, lawless,” and is not a proper name, but is used as a personification of evil; thus we have “son of Belial, daughter of Belial” (Deut. 13:13; Judg. 19:22; 1 Sam. 1:16; 1 Sam. 25:17,25). In the New Testament it is put in contradistinction to Christ as if it meant Satan ( 2 Cor. 6:15); it is there βελίαρ.
Strong’s Dictionary of Greek Words:
Meaning:
of Hebrew origin (1100); worthlessness; Belial, as an epithet of Satan
Jackson’s Dictionary of Scripture Proper Names:
worthlessness
Potts’ Bible Proper Names:
Worthless; without profit:―a personification of all that is bad, 2 Cor. 6:15. {Nequam}