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old lady

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noun Informal.
  1. a mother, usually one's own.
  2. a wife.
  3. a girlfriend or female lover, especially a female lover with whom one cohabits.
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Origin of old lady

First recorded in 1775–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for old lady

old lady

noun
  1. an informal term for mother 1, wife (def. 1)
  2. a large noctuid moth, Mormo maura, that has drab patterned wings originally thought to resemble an elderly Victorian lady's shawl
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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