1. • noun - an open or empty space in or between things
   • noun - a ceremony accompanying the start of some enterprise
   • noun - becoming open or being made open
   • noun - the first performance (as of a theatrical production)
   • noun - the act of opening something
   • noun - opportunity especially for employment or promotion
   • noun - the initial part of the introduction
   • noun - a possible alternative
   • noun - an aperture or hole that opens into a bodily cavity
   • noun - a vacant or unobstructed space that is man-made
   • noun - an entrance equipped with a hatch
   • noun - a recognized sequence of moves at the beginning of a game of chess
   • noun - the first of a series of actions
   • verb - cause to open or to become open
   • verb - start to operate or function or cause to start operating or functioning
   • verb - become open
   • verb - begin or set in action, of meetings, speeches, recitals, etc.
   • verb - spread out or open from a closed or folded state
   • verb - make available
   • verb - become available
   • verb - have an opening or passage or outlet
   • verb - make the opening move
   • verb - afford access to
   • verb - display the contents of a file or start an application as on a computer
   • adj - first or beginning
2. • The act or an instance of becoming open or being made to open.
   • An open space serving as a passage or gap.
   • A breach or an aperture.
   • A clearing in the woods.
   • The first part or stage, as of a book.
   • The first performance: the opening of a play.
   • A formal commencement of operation: attended the opening of the new museum.
   • A specific pattern or series of beginning moves in certain games, especially chess.
   • An opportunity affording a chance of success.
   • An unfilled job or position; a vacancy.
3. • n - a vacant or unobstructed space

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