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

However, trilateral trade has soared in recent years as Sino-US trade tensions have risen, with Mexico becoming Washington’s biggest trading partner. —Jeronimo Gonzalez, semafor.com, 11 June 2026

The three governments are planning to develop new unmanned undersea vehicles ⁠as part of their trilateral AUKUS defense ⁠pact. —Tim Lister, CNN Money, 31 May 2026

Produced by Singapore’s Robot Playground Media, the film is a trilateral co-production with Spain’s TV ON Producciones and Italy’s Altri Occhi, assembled across seven countries. —Naman Ramachandran, Variety, 28 Apr. 2026

The fact that the three countries plan to review their trilateral trade agreement, the USMCA, in July during the tournament adds extra weight. —Marco Quiroz-Gutierrez, Fortune, 19 Apr. 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