noun-modifying (irregular)
extramarital; outside marriage
Used prenominally to describe relationships, affairs, or activities occurring outside of marriage. Often appears in formal or legal contexts.
They divorced because of an extramarital relationship.
Discuss the legal rights of children born outside marriage.
child born out of wedlock; illegitimate child
extramarital sex; extramarital sexual relations
extramarital intercourse; adultery
Compound of 婚 (marriage) and 外 (outside). The exact historical derivation is uncertain, but the meaning is transparent from its components.