Interior wall, interior face of exterior wall, territorial wall.

From Okrand,startrek.klingon, 12/7/98.

An interior wall (such as a wall separating your living from from your kitchen)is a tlhoy'.A wall which divides a territory into parts (such as teh Berlin Wall) is also called a tlhoy', even though neither side of it is the interior of a structure. On occasion, for clarity, such a wall is termed a chevwI' tlhoy' "separator wall" or a pIn tlhoy', literally "boss wall," presumably dating back to a time when each sub territory had a specific person in charge.

See also chevwI' tlhoy', pa' reD, pa' tlhoy', pIn tlhoy'.

Opposite of reD.