Young Blonde Girl On The Chair In The Corner

In square dance, corner refers to the person you are adjacent to who is not your partner. In standard positioning (boy on the left, girl on the right), this would be for men (or gents) the person standing to one's left, and for ladies the person standing to one's right. In square dance one will often change partners and corners during the course of a dance, in which case one can distinguish between the "original corner" and a "situational corner".
In sports such as football (soccer) or boxing, corner may refer to a person or position (cornerman).
In ice hockey, the rink does not have any corners. It is an oval and therefore cannot have a corner.
A corner is also used in geography, such as the Four Corners Monument in the United States, marking the corner of state boundary lines.