BroadwayyoudaoicibaDictYouDict[Broadway 词源字典]
common street name, from broad (adj.) + way (n.); the allusive use for "New York theater district" is first recorded 1881.[Broadway etymology, Broadway origin, 英语词源]
off-Broadway (adj.)youdaoicibaDictYouDict
1953, "experimental theater productions in New York City," from off (adv.) + Broadway. Even more experimental off-off-Broadway is attested from 1967.