Spouse (noun)

1. A married person, especially a person of the opposite sex to the speaker.
2. A person's partner in marriage.

Origin:

Middle english: from old french espos, from latin sposus "betrothed", past participle of spondere "betroth".

Examples:

1. She is his spouse and they have been married for 10 years.
2. His spouse is a doctor and works at a local hospital.
3. The couple are seeking counseling to resolve issues in their marriage.
4. She is the loving spouse of a famous author.
5. The spouse of a diplomat often has to adjust to a new country and culture.