definition of
opening

[1] #1 opening a. first or beginning; "the memorable opening bars of Beethoven's Fifth"; "the play's opening scene". wn

[2] #2 opening n. [gap] 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". wn

[3] #3 opening n. a ceremony accompanying the start of some enterprise. wn

[4] #4 opening n. becoming open or being made open; "the opening of his arms was the sign I was waiting for". wn

[5] #5 opening n. [opening night, curtain raising] the first performance (as of a theatrical production); "the opening received good critical reviews". wn