In Britain, you use the expressions Your Ladyship, Her Ladyship, or Their Ladyships when you are addressing or referring to female members of the nobility or the wives of knights.
[politeness]
Her Ladyship's expecting you, sir.
Ladyship in British English
(ˈleɪdɪʃɪp)
noun
(preceded byyour or her)
a title used to address or refer to any peeress except a duchess
ladyship in American English
(ˈleɪdiˌʃɪp)
noun
1.
the rank or position of a lady
2. [usuallyL-]
a title used in speaking to or of a woman holding the rank of lady
, preceded by Your or Her
Examples of 'Ladyship' in a sentence
Ladyship
Everyone exchanged bows; then her ladyship, overwhelming in bronze bombazine, regally glided away.
Stephanie Laurens ALL ABOUT LOVE (2001)
But he's tried the same fawning with my Ladyship, and with as little effect.