As a Noun: 1. The act of working or acting together with other people for a purpose. English = cooperation. 2. The feeling of friendship people have when they are doing something together. English = fellowship, friendship, mateship. 3. The same opinion or idea about something shared between several people. English = agreement, accord. As a Verb or Adjective: 1. To work or act together with other people for a purpose. English = cooperate. 2. To share the same idea or opinion with a number of people. English = agree, harmonise.