Definition of "night-rail" [night-rail]

• A loose robe worn as a nightgown. (noun)

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• "All the candles were burning, the bed was turned down, a fluffy little Paris night-rail which I recognized as one I'd bought my darling lay by the pillow, and her scent was in the air."
• "I went up, and was making for the chamber I shared with Kralta when a soft voice called and I turned to see the Prince's maitresse-en-titre, she of the heroic bosom, standing in an open doorway in a silk night-rail that was never designed for sleeping."
• "I performed my ablutions in some bewilderment, and my good angel prompted me to wrap a towel round myself before venturing out, for when I did, damned if the door he'd used didn't open, and a massive bosom emerged, followed by the soulful countess in a night-rail fashioned apparently from a scrap of mosquito-net."