#1 opening a. first or beginning; "the memorable opening bars of Beethoven's Fifth"; "the play's opening scene". wn
#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 opening n. a ceremony accompanying the start of some enterprise. wn
#4 opening n. becoming open or being made open; "the opening of his arms was the sign I was waiting for". wn
#5 opening n. [opening night, curtain raising] the first performance (as of a theatrical production); "the opening received good critical reviews". wn
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