(business, finance) A trading method whereby traders gather in person, often in a pit, and call out to all their desire to buy or sell a quantity at a given price, transactions being consummated when two parties can agree on a price. Most frequently used in securities markets.

(finance) The total number of contracts outstanding between market participants in a market for futures, options, or other derivatives.

Alternative spelling of openwork

A mind willing to consider new ideas.

The collaborative design of things, especially of open source software, through use of publicly shared design information.

Crowdsourcing.

Willing to consider new and different ideas or opinions.

(grammar) A compound word with spaces in it, for example, high school, school bus, or science fiction.

A house habitually kept open to callers. / An event, often in one's home, at which there are few restrictions regarding who and how many may attend.

(sometimes attributive) Creative work that others can freely and legally copy or modify.