She then rose; but before retiring, addressed a few words to them with a pretty dignity, to which her mourning dress added a soberness that was hardly to be found in the words themselves.
In the background, mellowed by tawny shade, were the three women, Maryann Money, and Temperance and Soberness Miller, gathering up the fleeces and twisting ropes of wool with a wimble for tying them round.
Temperance Miller—oh, here's another, Soberness—both women I suppose?"
There are no more uses of "sober" identified with this meaning, but check unspecified meaning below.
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She was still sober enough to know the situation was dangerous.
I'm worried about her. I seldom see her sober and without a hangover.
The gentleman-farmer was dressed in cheerful style, in a new coat and white waistcoat, quite contrasting with his usual sober suits of grey.
It is not a denial of anything to have been always without it, and what Troy had never enjoyed he did not miss; but, being fully conscious that what sober people missed he enjoyed, his capacity, though really less, seemed greater than theirs.