I worked with a computer technician called Three-Way George. If you asked him how to do something, he’d always reply “Well, there are three ways…”. Likewise, there are (at least) three ways to describe a forest garden.
It’s always handy to have some simple forest garden definitions to hand.
A forest garden is:
A wildlife orchard underplanted with edible shrubs and perennial vegetables.
A wildlife garden you can eat (the plants, not the wildlife).