In the most basic sense the difference between a panel door and a flush door has to do with how each is constructed.
Panel door meaning.
Thus the cross bible or christian door.
Generally panel door comes in following types.
If you look at it it does look like a cross.
The 6 panel door.
The flat panels of the door fit between its stiles and rails.
A door having panels framed by stiles and rails of greater thickness compare flush door.
Each of these panels will fit together in order to create the finished door.
A stile is a length of wood positioned vertically on a door.
Panel doors are and have been very popular for quite some time.
A style of door construction that features vertical wood stiles and horizontal rails that form one or more frames around thinner recessed inner panels.
The bottom part represents an open bible.
If you look at a photo of a 6 panel door you can easily see how the framing of the top 4 panels resembles a cross.
The top part represent a cross.
A comparatively thin flat piece of wood or the like as a large piece of plywood.
And with perhaps a lot more imagination you can visualize the 2 smaller panels at the bottom as the pages of an open bible.
Frame and panel construction also called rail and stile is a woodworking technique often used in the making of doors wainscoting and other decorative features for cabinets furniture and homes.
The cross the bible the top.
Their name essentially tells you what they are the door is crafted not of one single piece of wood or other material but instead is comprised of panels.
See the image above the left door.
Doors usually have between one and eight.
Alternatively a flush door has a flat smooth surface without the elaborate design work of a panel door.
See the right door in the image above.
Rails are lengths of wood that run horizontally across a door.
Definition of panel door.
A panel door constructed with panels usually shaped to a pattern installed between the stiles and rails that form the outside frame of the door.
In a panel door the construction consists of vertical lengths of wood called stiles and horizontal lengths of wood called rails.
There is another form if this where it shows it is on the bottom.