Edging

Edging can refer to cutting a thin 3/8" trench next to the 'edge' of any concrete fixture, this could include

• Driveways
• Sidewalks
• Curbs
• or any other concrete structure that is adjacent to grass

It could also refer to making a divider between beds and sod to prevent the grass from encroaching on the beds.  This could be

• made by the same type edger used to edge concrete.
• made by a hand tool
• made by a bed redifiner

I use all 3 methods.