1. to sideline
corner somebody/the market
If you 'corner someone' or something you get them into a place or a situation from which they cannot easily escape."He first cornered the moose and then shot it." "She was cornered in a dark alleyway and couldn't see how to escape." 'To corner the market' means to obtain sufficient control so as to be able to manipulate the market price or to have the biggest market share without being a monopoly.