Definition of "block off" []

• To obstruct (verb)

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• "The radio station, a block off Decatur Street and close to Jackson Square, looked pretty much the same as it had then, the reception area with its padded benches, one wall covered by a glass case filled with awards and news items, pictures of celebrities, and even an authentic voodoo doll."
• "Chlorpromazine and other antipsychotic drugs seem to block off the dopamine receptors selectively; that is, they don't affect the receptors of other neurotransmitters."
• ""The private Chinese lunch club with forty-three members called the 74 in a block off Pedder Street that contains a gourmet chef from Shanghai, teen-age hostesses and bedrooms and saunas and devices that dirty old men need to raise their Steamless Stalks? Eh?""