Is premarital sex defined as a sin in the Bible? What about Homosexuality?

While the term “homosexuality” is not used in either the Old or New Testaments of the Scriptures, there can be no denial of the prohibition of sexual intercourse with someone of the same sex. (Leviticus 18:22; 20:13; Romans 1:26-27, 1 Cor. 6:9; 1 Timothy 1:10)

Also, the term “pre-marital” sex is absent from the Scriptures, but is more commonly referred to as “fornication”. In the O.T., fornication included, but was not limited to, “…any type of illicit sexual activity. Included in the realm of sexual misconduct in the O.T. are seduction, rape, sodomy, bestiality, certain forms of incest, prostitution (male or female), and homosexual relations (cf. Lev. 18; 19:20-22, 29; 20:10-21)” In the N.T. fornication included almost any form of sexual misconduct (that is, sexual activity outside the marriage relationship ( cf. 1 Cor. 6:9; 2 Cor. 12:21; Eph. 5:5; Col. 3:5; 1 Thess. 4:3; 1 Tim. 1:10; Heb. 13:4; Jude 7 )