completely black mourning clothes made of a drab material: After her brother died, she was in deep mourning for a year.
Origin of deep mourning
First recorded in 1715–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for deep mourning
Historical Examples of deep mourning
I wore my deep-mourning dress for the first time that day, and Mabel, similarly attired, sat beside me.Miriam Monfort
Catherine A. Warfield