It's an icon representing a corridor. It is simple in design and conveys the image that you are walking down a hallway. The hallway has paneling lining the corridor and gets smaller size until it reaches the end.
This Corridor icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.