Holy is both a characteristic of God as well as a lifestyle for us to emulate.
In reference to God, holy means sacred, worthy of worship, praise, and adoration. In the Hebrew culture a word was repeated three times to place emphasis on it. This is used with holy in reference to God: “Holy, holy, holy is the Lord God Almighty, who was, and is, and is to come,” (Revelation 4:8; also see Isaiah 6:3).
In regard to people, holy means living according to a moral code or standard. Throughout the Bible, God commands and implores us to be holy. In Leviticus 11:44, God says, “Be holy, because I am holy,” (which is quoted in 1 Peter 1:16.)
Compare to righteous.