relating to the principles of socialism, a system in which property such as the means of production are owned collectively or by the government;
e.g. They followed socialist theories in coming up with their new proposals.
(noun)
a person who believes in the principles of socialism, which state that property such as the means of production should be collectively owned, often by a central government;
e.g. The new candidate is a socialist whose ideas clash with the current administration's.