English Reference
noun

alliance

n.
US /əˈɫaɪəns/ UK /ɐlˈaɪəns/ al·liance UK spelling alliance's, alliance's, allianced, alliancing

  1. 01 B2 Upper Intermediate

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

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

    Simple

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

    In context

    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'.

  2. 02 B2 Upper Intermediate

    a group of people or countries that have joined together.

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

    Simple

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

    In context

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

  3. 03 C1 Advanced FormalLiterary

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

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

    Simple

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

    In context

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

    Teacher's tip

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

  4. 04 C2 Proficiency Formal

    a close connection between things because they are similar.

    a relationship based on an affinity in qualities or interests.

    Simple

    There is a natural alliance between the two scientific theories.

    In context

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

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
This entry
Level C1 · Advanced
Frequency Common
Updated