second mourning en · NOUN
Meanings
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(obsolete, uncountable) A style of dress dictated by etiquette to be allowable after strict mourning dress is no longer required.
I drest myself in my second-mourning suit in which I had been powdered […].
1763, James Boswell, edited by Gordon Turnbull, London Journal 1762-1763, Penguin, published 2014, page 237: