In the New King James Version (NKJV) of the Bible, the term fornication is translated from the Greek word “porneia” (πορνεία). This word is often used to refer to sexual immorality in general, including premarital sex, adultery, homosexuality, prostitution, incest, and other unlawful sexual acts according to biblical standards.

Key Verses in the NKJV:

1. 1 Corinthians 6:18 (NKJV)
   “Flee sexual immorality. Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body.”
   (Here, “sexual immorality” is translated from “porneia,” which includes fornication.)

2. Galatians 5:19-21 (NKJV)
   “Now the works of the flesh are evident, which are: adultery, fornication, uncleanness, lewdness, idolatry, sorcery, hatred, contentions, jealousies, outbursts of wrath, selfish ambitions, dissensions, heresies, envy, murders, drunkenness, revelries, and the like; of which I tell you beforehand, just as I also told you in time past, that those who practice such things will not inherit the kingdom of God.”
   (Fornication is listed as one of the sinful behaviors.)

3. Hebrews 13:4 (NKJV)
   “Marriage is honorable among all, and the bed undefiled; but fornicators and adulterers God will judge.”
   (This verse shows that sexual activity is meant for marriage, and those who engage in fornication will be judged.)

In the New King James Version (NKJV), the book of Jude mentions fornication in Jude 1:7 as part of a warning against sinful behavior. Here’s what it says:

Jude 1:7 (NKJV) “as Sodom and Gomorrah, and the cities around them in a similar manner to these, having given themselves over to sexual immorality and gone after strange flesh, are set forth as an example, suffering the vengeance of eternal fire.”

The phrase “sexual immor

ality” here is often understood to include fornication (which refers to sexual relations outside of marriage). This passage warns that the people of Sodom and Gomorrah were judged by God due to their sexual sins, including fornication, and serves as an example of divine judgment.

Conclusion:

In the NKJV, fornication refers to any form of sexual immorality outside the biblical covenant of marriage. It is consistently condemned in Scripture as an act that goes against God’s design for human relationships.