Human Design
← Knowledge base

Definition

How the defined centers connect: single, split, triple and quadruple split definition, and bridging.

What definition is

Definition shows how the defined centers in a chart are connected. When a channel is activated at both ends, it "switches on" two centers and a steady energy flows between them. Channels can chain several centers into one system, or they can form separate groups with no link between them. What's defined is your constant, reliable side, while the open centers around it take in other people's influence.

Kinds of definition

The number of separate groups gives the kind of definition: single (one group), split (two), triple split (three), quadruple split (four), and no definition in the Reflector. It shows how a person processes information — on their own and quickly, or over time, through other people and different settings — and where the strongest conditioning comes from: the open centers or the bridging gates. Definition doesn't replace strategy and authority, but it helps you understand the pace of your decisions.

Single Definition

Single definition means every defined center in the chart is linked by channels into one continuous system. People with it usually feel whole on their own and don't go looking for someone to complete them. Roughly 41% of people have it, and they tend to find time alone easier than most.

Read more →

Split Definition

Split definition means the defined centers form two separate groups with no channel between them. It's the most common layout — roughly 45% of people. Those who have it often feel something is missing and are drawn to people who close the gap — which is exactly why it matters not to hand those people their decisions.

Read more →

Triple Split Definition

In a triple split definition the defined centers form three separate groups. That's roughly one person in ten. They don't need one "right" bridge — they need variety, movement and time for everything inside them to come together. Haste and a single dominant influence hurt them most.

Read more →

Quadruple Split Definition

Quadruple split definition is the rarest layout: the defined centers form four separate groups. It is about one person in two hundred. The chart is almost fully defined, so the person is very stable but takes life in at an unhurried pace and needs time for every important decision.

Read more →

No Definition (Reflector)

No definition means a chart with not a single defined center. This is the design of the Reflector, the rarest type — roughly 1% of people. With no fixed inner system, the person experiences the world through others and through the transits, finding clarity in the rhythm of the lunar cycle.

Read more →

Bridging Gates and Connections

A bridging gate is the missing gate that would join two separate groups of defined centers. Bridges explain why we're drawn to certain people and why we feel more whole around them. They're brought by other people, by planetary transits and even by simply being among strangers.

Read more →