Main Difference
The main difference between Manor and Mansion is that the Manor is a an estate in land to which is incident the right to hold a manorial court and Mansion is a large dwelling house.
Manor
A manor in English law is an estate in land to which is incident the right to hold a court termed court baron, that is to say a manorial court. The proper unit of tenure under the feudal system is the fee (or fief), on which the manor became established through the process of time, akin to the modern establishment of a “business” upon a freehold site. The manor is nevertheless often described as the basic feudal unit of tenure and is historically connected with the territorial divisions of the march, county, hundred, parish and township.
Mansion
A mansion is a large dwelling house. The word itself derives through Old French from the Latin word mansio “dwelling”, an abstract noun derived from the verb manere “to dwell”. The English word “manse” originally defined a property large enough for the parish priest to maintain himself, but a mansion is no longer self-sustaining in this way (compare a Roman or medieval villa). ‘Manor’ comes from the same root—territorial holdings granted to a lord who would remain there—hence it is easy to see how the word ‘Mansion’ came to have its meaning.
Manor (noun)
A landed estate.
Manor (noun)
The main house of such an estate or a similar residence; a mansion.
Manor (noun)
A district over which a feudal lord could exercise certain rights and privileges in medieval western Europe.
Manor (noun)
The lord’s residence and seat of control in such a district.
Manor (noun)
Any home area or territory in which authority is exercised, often in a police or criminal context.
Manor (noun)
One’s neighbourhood.
Mansion (noun)
A large house or building, usually built for the wealthy.
Mansion (noun)
A luxurious flat (apartment).
Mansion (noun)
A house provided for a clergyman; a manse.
Mansion (noun)
A stopping-place during a journey; a stage.
Mansion (noun)
An astrological house; a station of the moon.
Mansion (noun)
One of twenty-eight sections of the sky.
Mansion (noun)
An individual habitation or apartment within a large house or group of buildings. (Now chiefly in allusion to John 14:2.)
Mansion (noun)
Any of the branches of the Rastafari movement.
Manor (noun)
a large country house with lands
“a Tudor manor house in the English countryside”
“Kelmscott Manor”
Manor (noun)
(in England and Wales) a unit of land, originally a feudal lordship, consisting of a lord’s demesne and lands rented to tenants
“the right to mine ores within the manor of Little Langdale”
Manor (noun)
(in North America) an estate or district leased to tenants, especially one granted by royal charter in a British colony or by the Dutch governors of what is now New York State.
Manor (noun)
the district covered by a police station
“they were the undisputed rulers of their manor”
Manor (noun)
one’s own neighbourhood or area of operation.
Mansion (noun)
a large, impressive house.
Mansion (noun)
a large block of flats.
Mansion (noun)
a terrace or mansion block
“Carlyle Mansions”