Socialist means believing the state should own and share out the wealth. A socialist government, socialist policies, a democratic socialist.
The word covers an enormous range, from parties that simply want strong public services to states that abolished private ownership. In American politics socialist is chiefly used as an accusation, which is not so elsewhere.
socialist is a belief.
Middle French
social
English
social
English, today
socialist
Built from
From social + -ist. social Borrowed from Middle French social. From Middle French social, from Latin sociālis (“of or belonging to a companion or companionship or association, social”), from socius (“a companion, fellow, partner, associate, ally”), from sequor (“follow”). Cognate with English seg (“man, companion, fellow”). More at seg.
Etymology from Wiktionary, CC BY-SA