close out

To terminate; to call the end of.

Of a wave, to break all at once, instead of progressively along its length.

“2005: You either want to land on the top of the wave (if it has closed out), or in the transition — Pete Devries, Surfing Vancouver Island http//www.surfingvancouverisland.com/surf/tricktips/backside_air.htm”

To terminate a computer program.

To exclude by blocking all opportunities to enter or join.