A more thorough explanation:

Definition: A townhouse is a type of dwelling unit that usually has two or three stories. It is often connected to a similar structure by a common wall and, particularly in a planned-unit development, shares and owns in common the surrounding grounds. It is also known as a townhome.

• A row of townhouses in a suburban neighborhood.
• A townhouse complex with shared amenities such as a pool and playground.
• A townhouse with a garage on the first floor and living spaces on the upper floors.

These examples illustrate the definition of a townhouse by showing different types of structures that fit the description. They all have multiple stories and are connected to other similar structures by a common wall. Additionally, the second example shows how townhouses can share common amenities and grounds in a planned-unit development.