What is the meaning of En_suite?

So as to form a cohesively themed or matching set.

In a series of rooms which connect to each other, forming a series or set (later especially with reference to the position of a bathroom).

Comprising a set of connected rooms; pertaining to a bathroom with an adjoining bedroom, or a bedroom with an adjoining bathroom, such that they form part of the same set of connected rooms.

Forming part of a cohesively themed or matching set or series.

Alternative form of ensuite.

Source: wiktionary.org