Socialism is an economic and political philosophy encompassing diverse economic and social systems characterised by social ownership of the means of production, as opposed to private ownership.
Words mean what they're used to mean. Even the word "government" is wildly different between Europe and the US. We flip out over headlines like the government of Belgium has collapsed! and it's only as much of a kerfuffle as the House trying to elect a Speaker.
If ever there was a real world example of Newspeak, it is how—thanks to class war and three red scares—the working class no longer even has a word for socialism. So now welfare capitalists like Bernie Sanders call themselves socialist despite never calling for the abolition of the private ownership of the means of production. It’s an amazing achievement of the capitalist class’ propaganda machine.