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multilateral

mul-tee-LAT-er-ul /ˌmʌltiˈlætərəl/

adjectiveB2GRESATIELTSTOEFLUPSC

formalpoliticaldiplomatic

Agreed upon, pursued, or participated in by three or more parties or nations.

Implies cooperation across multiple nations, usually through formal institutions like the UN or WTO, balancing diverse interests.

The story behind the word. Combining Latin 'multi' (many) and 'latus' (side), 'multilateral' literally describes something that has 'many sides'. In international law and diplomacy, this geometric term evolved to describe agreements or efforts that bring multiple nations together around one table.

Word relationships

international: International broadly refers to anything involving multiple nations, while multilateral specifically means three or more parties acting jointly through an agreed framework.
collective: Collective emphasizes shared effort by a group, whereas multilateral specifies formal participation by multiple sovereign entities.

unilateral: Unilateral describes an action taken by a single state acting alone without international consensus.
bilateral: Bilateral involves exactly two nations or parties.

Commonly confused with

unilateral: Multilateral involves three or more states acting together, whereas unilateral involves one state acting on its own.

Word family

multilateralism (noun): The principle of participation by three or more nations in an alliance or treaty.
multilaterally (adverb): In a manner involving three or more parties.

Collocations

multilateral trade agreement
multilateral diplomacy
multilateral framework
multilateral institution

Idioms & expressions

multilateral consensus

Example sentences

"The climate agreement was the result of painstaking multilateral negotiations involving nearly two hundred member states." Diplomatic Negotiations
"Solving planetary challenges requires a commitment to robust multilateral cooperation rather than isolated actions." Global Policy

Memory hook

MULTI (many) + LATERAL (sides) = many sides coming together around a negotiation table. Many sides working as one.

When not to use

Do not use when only two parties are involved (use bilateral) or when one nation acts alone (use unilateral).

Fun facts

The concept of formal multilateral diplomacy was largely birthed at the Congress of Vienna in 1815, where major European powers met collectively to reconstruct Europe after the Napoleonic Wars.