The dictionary defines evil as, morally wrong; immoral; wicked. It could be something harmful or injurious; the synonyms though may be the best descriptions.
Depending on how it is used evil can be; sinful, iniquitous, depraved, base, vile, nefarious, pernicious, destructive, wickedness, unrighteousness, or corruption, to name a few.
“After these things I heard a loud voice of a great multitude in heaven, saying, ‘Alleluia! Salvation and glory and honor and power to the Lord our God! For true and righteous are His judgments, because He has judged the great harlot who corrupted the earth with her fornication; and He has avenged on her the blood of His servants shed by her.’ Again they said, ‘Alleluia! And her smoke rises up forever and ever!’ And the twenty-four elders and the four living creatures fell down and worshiped God who sat on the throne, saying, ‘Amen! Alleluia!’” Revelation 19:1-4.
“He who is unjust, let him be unjust still; he who is filthy, let him be filthy still; he who is righteous, let him be righteous still; he who is holy, let him be holy still.” Revelation 22:11.
“And God said to Noah, ‘The end of all flesh has come before Me, for the earth is filled with violence through them; and behold, I will destroy them with the earth.’” Genesis 6:13.
“… [Gentiles] who, being past feeling, have given themselves over to lewdness, to work all uncleanness with greediness. But you have not so learned Christ…” Ephesians 4:19-20.
