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 is a Corridor icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.