opening

noun

1. 1

   the first of a series of actions

2. 2

   the act of opening something

   the ray of light revealed his cautious opening of the door

3. 3

   becoming open or being made open

   the opening of his arms was the sign I was waiting for

4. 4

   a recognized sequence of moves at the beginning of a game of chess

   he memorized all the important chess openings

5. 5

   an entrance equipped with a hatch; especially a passageway between decks of a ship

6. 6

   a vacant or unobstructed space that is man-made

   they left a small opening for the cat at the bottom of the door

7. 7

   an aperture or hole that opens into a bodily cavity

   the orifice into the aorta from the lower left chamber of the heart

8. 8

   a possible alternative

   bankruptcy is always a possibility

9. 9

   the initial part of the introduction

   the opening established the basic theme

10. 10

    the first performance (as of a theatrical production)

    the opening received good critical reviews

11. 11

    a ceremony accompanying the start of some enterprise

12. 12

    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