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an open or empty space in or between things;
"there was a small opening between the trees"
"the explosion made a gap in the wall"
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a ceremony accompanying the start of some enterprise
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becoming open or being made open;
"the opening of his arms was the sign I was waiting for"
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the first performance (as of a theatrical production);
"the opening received good critical reviews"
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the act of opening something;
"the ray of light revealed his cautious opening of the door"
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opportunity especially for employment or promotion;
"there is an opening in the sales department"
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the initial part of the introduction;
"the opening established the basic theme"
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a possible alternative;
"bankruptcy is always a possibility"
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an aperture or hole that opens into a bodily cavity;
"the orifice into the aorta from the lower left chamber of the heart"
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a vacant or unobstructed space that is man-made;
"they left a small opening for the cat at the bottom of the door"
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an entrance equipped with a hatch; especially a passageway between decks of a ship
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a recognized sequence of moves at the beginning of a game of chess;
"he memorized all the important chess openings"
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the first of a series of actions