Action - (noun)
An ‘action’ can include a range of acts including lobbying, campaigns and demonstrations; however in a trade union context it usually includes industrial action, which is strike action or action short of a strike.
Source: Own Definition (Needs checking)
Example of Use: 1) The ETUC takes action in a number of ways: through political pressure and negotiations with EU institutions, social dialogue, and large-scale demonstrations. 2) After negotiations broke down, the trade union balloted its members on whether they wanted to take strike action.