trilateral

adjective

tri·​lat·​er·​al (ˌ)trī-ˈla-tə-rəl 

-ˈla-trəl

: having three sides or parties

trilateral business ventures

trilateral discussions

Examples of trilateral in a Sentence

Recent Examples on the Web

Today, more than ever, this trilateral World Cup offers an opportunity not only to celebrate sports, but also to recognize the strength of friendship and collaboration between our two nations. —Chicago Tribune, 7 Mar. 2026

The trilateral trade agreement between Canada, Mexico, and the US could require annual reviews if Washington refuses to sign an extension, risking huge trade upheaval, Ottawa warned. —Jeronimo Gonzalez, semafor.com, 27 Feb. 2026

Thursday’s talks between the American and Ukrainian envoys were to address details of a possible postwar recovery plan for Ukraine and discuss preparations for an upcoming trilateral meeting with Moscow officials, perhaps next week, according to Zelenskyy. —ABC News, 26 Feb. 2026

The outlet noted that the Swiss city is also expected to be the site of U.S.-Iran nuclear negotiations on the same day as the trilateral talks. —Rachel Wolf, FOXNews.com, 25 Feb. 2026

Word History

Etymology

Latin trilaterus, from tri- + later-, latus side

First Known Use

1660, in the meaning defined above

Rhymes for trilateral

• bilateral
• collateral
• anterolateral
• posterolateral
• basolateral
• contralateral
• dorsolateral
• equilateral
• ipsilateral
• multilateral
• quadrilateral
• unilateral

Kids Definition

trilateral

adjective

tri·​lat·​er·​al (ˈ)trī-ˈlat-ə-rəl 

-ˈla-trəl

: having three sides