Definition of alliance noun from the Oxford Advanced American Dictionary

     

    alliance

     noun
    noun
    NAmE//əˈlaɪəns//
     
     
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  1. 1 an agreement between countries, political parties, etc. to work together in order to achieve something that they all want to form/make an alliance alliance with somebody/something The unions are now in alliance with the Democrats. alliance between A and B an alliance between education and business to develop the use of technology in schools
  2. 2 a group of people, political parties, etc. who work together in order to achieve something that they all want The Rainforest Alliance was formed to campaign against environmental damage.
  3. Word Familyally verb nounallied adjectivealliance noun
See the Oxford Advanced Learner's Dictionary entry: alliance