n.1.A female guardian.
I have placed a trusty, watchful guardianess.
- Beau. & Fl.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
There are visitors coming from London: my guardian, my guardianess, their daughter, my mother, and about a hundred more."
When Masque Fop is proudly produced, however, Niece Oldcraft subjects him to continual mockery and repeated rejections until Cunningame tricks him into marrying Mirabell, the niece of the Guardianess. The eventual union of Cunningame and Niece Oldcraft is achieved during the revels or dancing in Wittipate's 'abstract of a masque' in the final act.