plural of corner
"The children played tag around the corners of the large room."
Third-person singular simple present indicative form of corner
"The cat corners its prey in a tight alleyway."
In plain English: To corner someone means to trap them so they have nowhere left to go.
"The security guard corners the suspect in an alleyway before he can escape."
plural of Corner
"The referee blew the whistle as soon as the players collided in the corners of the field."