1. The main or principal source of assistance, help, or backing
Her family is her primary support during difficult times.
Sua família é seu apoio primário durante tempos difíceis.
2. In construction/engineering: the main structural element that bears weight
The primary support of the building consists of reinforced concrete pillars.
O apoio primário do edifício é constituído por pilares de concreto armado.
3. In healthcare/social services: the initial or main source of care and assistance
The primary support for elderly patients should include family involvement.
O apoio primário para pacientes idosos deve incluir o envolvimento da família.