Single Definition
All of your defined centers are linked together: your fixed parts form one connected whole.
In your chart, all of your defined centers are connected to one another. This means your fixed parts are joined in one piece, and none of them stands on its own.
There is no gap between your defined centers that another person would first have to bridge.
Altogether, the teaching recognizes five kinds of Definition: No Definition, Single Definition, and splits in which the defined centers form two, three or four groups. About four in ten people have a Single Definition like yours; only the split into two areas is somewhat more common.
Single Definition changes nothing about your Strategy and Authority; they apply to your decisions just as they are.
Human Design is a system of interpretation, not a scientifically proven method. Read this description as an invitation to observe yourself.