onstage

US /ˌɑːnˈsteɪdʒ/
UK /ˌɑːnˈsteɪdʒ/
"onstage" picture
1.

on or onto the stage

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The actors walked onstage to take their bows.
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She felt nervous before stepping onstage.
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offstagebackstage
1.

situated or taking place on the stage

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The onstage chemistry between the two leads was undeniable.
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The director made some changes to the onstage blocking.
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offstagebackstage