The house in which one resides; an inhabited house, especially one of considerable importance or grandeur; a manor-house.(noun)
The Century Dictionary (Public Domain)
Use "mansion-house" in a sentence
"Away ran Dick Gardener with this message; and, in a few minutes, lights were seen to flit about, which convinced Fairford, who was now, in consequence of the halt, a little restored to self-possession, that they were traversing the front of a tolerably large mansion-house."
"It was fitted up with a sort of fanciful neatness; and in its perfect arrangement and good order, formed a strong contrast to the other apartments of the old and neglected mansion-house."
"Hugh upon the baronet's settling in the large mansion-house of that village; but he had not visited at the house, nor had his company been solicited."