How do you define a healthy relationship?

As obvious as it may seem, nowadays, we need to define this. Basically it boils down to these key elements:

Trust. Having trust in your partner creates healthy boundaries. Privacy is respected and commitment is not questioned.
Equality. Partners have an equal say in the relationship. Decisions are made together and both parties have a voice.
Loyalty. Partners advocate on each other's behalf and look out for each other’s best interests.
Communication. All parties can talk about the good and the bad. Communication is open, honest, and judgment-free.
Respect. Each person in the relationship respects each other, feels valued, and is mutually supported.