Monogamous (adjective)

1. The practice of having only one sexual partner or only one spouse during a period of time.
2. The state of being married to one person at a time.

Origin:

From the greek word "monos" meaning "single" and "gamos" meaning "marriage".

Examples:

1. A monogamous relationship is one in which the partners are committed to each other.
2. Monogamous animals form pair-bonds with a single partner.
3. The couple decided to have a monogamous relationship.
4. Some cultures have a tradition of monogamous marriages.
5. Monogamous species of birds typically mate for life.