Here’s some door terminology:
- Door system – a door slab & frame assembly, with slab pre-hung in the frame
- Frame – an assembly of structural parts used to fasten a door to a structure
- Keyway – the slot in a lock in which the key is inserted
- Lite – a framed piece of glass within a door slab, sidelight or transom
- Rail – the horizontal pieces of a door slab
- Sidelight – fixed, usually rectangular, decorative glass on either or both sides of a door system
- Slab – the operating part of a door system
- Stile – the vertical pieces of a door slab
- Sweep – flexible seal material attached to the bottom of a door slab
- Threshold – bottom component of a door system
- Transom – decorative glass above a door system
*Source http://en.jeld-wen.ca/blog/2013/08/30/anatomy-of-a-door/