A corner can hide a turn ahead or hold you in place. Being cornered is read as feeling trapped with few options; sitting in a corner, as retreat — or the old memory of being made to stand there.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.