Classical architecture uses architrave to designate the bottom part of a certain type of lintel called an entablature. In an entablature, it forms the bottom third part of the bottom third of the vertical columns. Usually, architraves are horizontal or vertical moldings around openings, such as doors or windows.
Define Architrave
There are most homeowners who won't even think about architraves for the rest of their lives. Your doors and windows are framed by an architrave, which is an interior molding, decorative trim. A wall covering enhances the look of a room as well as conceals unsightly seams and joints.