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