I. noun
1. : a house in town as distinguished from a house in the country
there was a smart town house and a rococo summer estate — Harriot B. Barbour
specifically : the city residence of one having a countryseat or having a chief residence elsewhere
stayed at their town house for a few weeks during the social season
2. usually townhouse ˈ ̷ ̷ˌ ̷ ̷ chiefly Britain : town hall 1
II. noun
: a single-family house of two or sometimes three stories connected to another house by a common sidewall ; also : row house