Technology / Email / Open Relay: An SMTP email server that allows outsiders to relay email messages that are neither for nor from local users. Often exploited by spammers and hackers.
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Open Adjective Synonyms: ajar, gaping, agape, unfastened, unlocked, unbarred, unbolted, unlatched, unclosed
Open Verb Synonyms: unblock, clear, unobstruct, unclog, unstop
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Business / Finance / Open Up: Used in the context of general equities. Disclose more information (e.g., the exact price and quantity of one's potential interest). See: Put pants on it. MORE
Entertainment / Video Games / Open world: This is a game world that allows players to roam freely, and break out of the typically linear structure that most games provide. MORE
Business / Accounting / Open Transaction: A transaction that is not completed at the end of the accounting period: a purchase that has not yet been paid for or a sale where payment is yet to be collected when the accounting period ends. MORE
Lifestyle / Travel / Open Ticket: Ticket that is valid for transportation between certain points but indicates no specific reservation. MORE
Technology / Computers / Open Systems Interconnection (OSI): A reference model developed by the International Organization of Standardization. It splits networking into seven layers which provide specific services and communications standards. MORE
Entertainment / Literature / Open-Air Theater: An amphitheater, especially the unroofed public playhouses in the suburbs of London. Shakespeare's Globe and the Rose are two examples. MORE