leftism

noun

1. a member of the political Left or a person sympathetic to its views.

adjective

2. of, pertaining to, characteristic of, or advocated by the political Left.

adjective

1. of, tending towards, or relating to the political left or its principles

noun

2. a person who supports or belongs to the political left

n.1917, from left in the political sense + -ism. adj.1897, from left (adj.) in the political sense + -ist. One who holds a left-wing viewpoint; someone who seeks radical social and economic change in the direction of greater equality.