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1. The state of being allied or confederated
   - confederation
    
2. A connection based on kinship, marriage or common interest
   "the shifting alliances within a large family";
   - bond
    
3. An organization of people (or countries) involved in a pact or treaty
   - coalition, alignment, alinement [non-standard]
    
4. A formal agreement establishing an association or alliance between nations or other groups to achieve a particular aim
    
5. The act of forming an alliance or confederation
   - confederation

Derived forms: alliances

Type of: accord, coalition, connectedness, connection, connexion [Brit], fusion, group action, organisation [Brit], organization, pact, treaty

Antonym: nonalignment

Encyclopedia: Alliance, Oh