On a coat, there is no change from the collar to the lapel; it is a rounding continuation of the collar.
an attached collar rolled back in a continuous tapering line that follows the surplice neckline of a garment
An unnotched lapel with no gorge.
A tuxedo collar in which collar is attached and rolled back in a smooth, rounded, continuing line along the neckline of the garment.
On a coat, indicates a lapel that is a continuation of the collar.