1897, from left (adj.) in the political sense + -ist.
权威例句
1. They make no secret of their leftist sympathies.
他们毫不掩饰自己对左派的同情。
2. Activists pasted up posters criticizing the leftist leaders.
激进分子张贴起海报批评左翼领袖。
3. But we must not think of Chekhov as a leftist, much less a revolutionary.
但是我们绝不应把契科夫看成是个左派人物,他更不是革命者。
4. In return, they are themselves accused of furthering their own (leftist) political interests.
作为回应,他们自己也被指责推动自己的(左翼)政治利益。
5. The Ultra - Leftist line was a line that would have wrecked a country , ruined the people , and led to the destruction of the Party and national subjugation.