English Reference

Word

alliance

Phoneticsal·liance

US/əˈɫaɪəns/

UK/ɐlˈaɪəns/

Definitions

01political/military agreement

B2 · Upper Intermediate Countable noun

n. a formal agreement between countries or political parties to help each other.

n. a formal pact or treaty between nations or political organisations to cooperate for specific purposes, such as mutual defence.

“The two countries formed a military alliance to protect their borders from attack.”

“The shifting geopolitical landscape forced the smaller nations to forge a strategic alliance against the growing influence of their neighbour.”

Usage

Often used with the verbs 'form', 'forge', or 'enter into'.

02the group itself

B2 · Upper Intermediate Countable noun

n. a group of people or countries that have joined together.

n. a group of states, parties, or individuals that are allied.

“The retail alliance works together to get better prices from suppliers.”

“The alliance issued a joint statement condemning the trade restrictions imposed by the international council.”

Synonyms

03marriage between families

C1 · Advanced Countable noun Formal · Literary

n. a connection between families, often through marriage, to gain power or wealth.

n. a union between families or individuals, typically established by marriage for social, political, or financial advantage.

“In the past, a royal marriage was often a way to create a powerful alliance.”

“The marriage was less a romantic union and more a calculated alliance designed to consolidate the two families' vast estates.”

Teaching tip

While common in historical contexts, this sense is rarely used for modern marriages unless they are between extremely powerful dynasties.

Synonyms

04similarity or connection

C2 · Proficiency Countable noun Formal

n. a close connection between things because they are similar.

n. a relationship based on an affinity in qualities or interests.

“There is a natural alliance between the two scientific theories.”

“The philosopher noted a deep alliance between the aesthetic values of the two seemingly unrelated cultures.”

Collocations

Common phrases and expressions where native English speakers use the word “alliance” in context.

Verb

01. dissolve an alliance

“The political parties voted to dissolve their alliance after failing to agree on the new budget.”

verb + noun

02. enter into an alliance

“Several smaller nations chose to enter into an alliance for mutual defense.”

verb + prep + noun

03. forge an alliance

“The two tech giants decided to forge an alliance to compete with the rising market leader.”

verb + noun

Adjective

04. strategic alliance

“The airline formed a strategic alliance with a regional carrier to expand its flight network.”

adj + noun

05. uneasy alliance

“There was an uneasy alliance between the two factions, marked by constant suspicion.”

adj + noun

06. unholy alliance

“Critics described the deal between the rival corporations as an unholy alliance.”

adj + noun

Preposition

07. in alliance with

“The rebels acted in alliance with local tribes to overthrow the dictator.”

prep + noun + prep

Real-World Examples

“Saudi Arabia announces start of Red Sea defence alliance: Will it work?”
Al Jazeera 14 Aug 2026
“Mundubile is a former minister in the Patriotic Front (PF) government that ruled from 2011 to 2021, with his alliance drawing support from backers of the late former President, Edgar Lungu.”
BBC News 14 Aug 2026
“Over time, this arrangement became one of biology’s most important alliances.”
The Guardian 9 Aug 2026

Word family

NOUN

alliance(C1)

Related words

Domain

Politics

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Common
Level
C1 · AdvancedOxford
Updated

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