left-wing Definition

1. The members of a political party or group who are most inclined towards a socialist viewpoint.
2a. sport.
The extreme left side of a pitch or team in a field game;
Example: took the ball down the left wing
2b. sport.
A player playing on this side.
Example: The left wing scored a hat-trick
Form: left-winger (also)
3. The left side of an army.

Belonging or relating to the left wing.