off-Broadway
US /ˌɔːfˈbrɔːdweɪ/
UK /ˌɔːfˈbrɔːdweɪ/

1.
relating to or denoting plays performed in New York City in smaller theaters than Broadway theaters, typically seating 100–499 people, and often featuring experimental or non-commercial productions.
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Many experimental plays start off-Broadway before moving to larger venues.
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She dreams of performing off-Broadway someday.
1.
a theatrical production or venue that is off-Broadway.
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The new play is an off-Broadway hit.
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They decided to stage the musical as an off-Broadway production.