a short jacket worn, usually by a woman, over a nightgown or pajamas, especially while sitting up in bed.
Origin of bed jacket
First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a woman's short upper garment worn over a nightgown when sitting up in bed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012