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to move something like a window or door into a position that people, things, etc. can pass through or use
to unfold or spread something that was previously closed or folded
to start or begin a meeting, speech, performance, etc.
to facilitate the availability or accessibility of something
to become available for use or access
to initiate action in a card game by making the first move
to have a passage, entryway, or outlet that allows access to a space or area
to make the contents of a file or an application visible on a computer screen
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a clear or unobstructed space or expanse of land or water
where the air is unconfined
information that has become public
a tournament in which both professionals and amateurs may play
