If you refer to someone as a freedom fighter, you mean that they belong to a group that is trying to change the government of their country using violent methods, and you agree with or approve of this.
[approval]
freedom fighter in British English
noun
a militant revolutionary
Examples of 'freedom fighter' in a sentence
freedom fighter
Less about honouring freedom fighters than bullying by media and opportunist politicians.
Times, Sunday Times (2016)
Small groups of freedom fighters had established themselves in the capital and the leading provincial centres.
Times, Sunday Times (2009)
The two men had reportedly visited her home seeking help to leave the country and become freedom fighters.