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

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

The regular times of day when a shop, office or similar is open to the public.

Used other than figuratively or idiomatically: see open, attack: to begin attacking, to commence battle. / (cricket) Of a bowler: to bowl one of the first two overs.

Unrestricted by definite limits. / Adaptable to change. / Permitting a spontaneous or unstructured response.

(obsolete) Talkative; eager to speak. / With the mouth open. / Gaping in surprise, wonder or astonishment.

Crowdsourcing.

Willing to consider new and different ideas or opinions.

(software) Of or relating to a product which is licensed to permit modifications and redistribution of its source code, as per The Open Source Definition.

(transitive) To release the source code of.