Noun
The wife of a viscount.
A woman holding the rank of viscount in her own right.
Before his own elevation to an earldom, Disraeli's wife was created Viscountess Beaconsfield by Queen Victoria.
Sykes (1984), p. 75 Nancy Astor, Viscountess Astor She did marry an Englishman. Source: Internet
Viscountess Astor was not the first woman elected to the Westminster Parliament. Source: Internet