One of the mysteries of the English language finally explained.
(The governing body of) the British Broadcasting Corporation, the headquarters of which are in Portland Place. Also used attributive, designating something suggestive of the style or tone of the British Broadcasting Corporation.
1930s; earliest use found in Dorothy L. Sayers (1893–1957), writer and scholar. From Portland Place, the name of a street in London.
Portland Place/ˌpɔːtlən(d) ˈpleɪs/
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