What does partial sun/partial shade/full sun/full shade mean?

Full shade refers to areas in your garden that receive fewer than four hours of sun each day.

Partial shade and partial sun refer to areas of your garden that receive between four hours and six hours of sun each day. If your plant calls for partial shade, it will do better at the lower end of this sun exposure scale. If your plant calls for partial sun, it will do better at the higher end of this time frame.

Full sun refers to areas in your garden that receive at least six hours of sun each day.