1. (of a game) where total payout is fixed, so what one person gains the other must lose

Encyclopedia: Zero-sum

• open-faced
• open-heart surgery
• open-hearth
• open-hearth furnace
• open-hearth process
• open-minded
• open-mindedly
• open-mindedness
• open-plan
• open-source
• openbill
• opencast
• opencast mining
• opencut
• opened
• opener
• openhanded
• openhandedness
• openhearted
• opening
• opening line
• opening move
• opening night
• openly
• openmouthed