Upper-Intermediate (B2)
IPA: /ˌmʌl.tɪˈlæt.ər.əl/
KK: /mʌlˈtɪlɪtərəl/
Definition
Relating to or involving multiple countries or groups, especially in agreements or discussions.
Example
The leaders met to discuss a multilateral agreement on climate change.
Conversation

Did you hear about the new multilateral agreement they signed?

Yeah, I read a bit about it; it sounds promising for trade.

I think it's great that so many countries are getting involved in these multilateral discussions.

Definitely! It could really help improve relationships between them.
Synonyms & Antonyms
Synonyms
multiple
many-sided
polyhedral
Antonyms
unilateral
bilateral
single
Root Explanation
Multilateral → It is formed from "multi-" (meaning many) and "lateral" (from Latin "lateralis", meaning side). The word "multilateral" refers to something involving many sides or parties.
Memory Tip
Think of 'many' ('multi-') sides ('lateral') coming together — that's what multilateral means.
Visually Confused Words
unilateral
trilateral
mutilate