Trilateral (adjective)

Involving three parties or elements; having three sides or three points of connection.

Origin:

Late 19th century: from tri- "three" + lateral.

Examples:

1. A trilateral agreement was signed between the three countries to strengthen their economic ties.
2. The trilateral meeting between the leaders of the United States, Russia, and China was an important event in world politics.
3. The trilateral commission is a group of experts and leaders from three different regions who come together to discuss global issues.
4. The trilateral relationship between the United States, Japan, and South Korea is an important one for the stability of the region.
5. The trilateral nature of the project meant that it had to be approved by all three countries before it could be carried out.