1. to maintain something at a steady, unchanging level or state
We need to keep constant pressure on the wound to stop the bleeding.
Precisamos manter pressão constante na ferida para parar o sangramento.
2. to preserve consistency in an action, quality, or condition
The temperature must be kept constant for the experiment to work properly.
A temperatura deve ser mantida constante para que o experimento funcione corretamente.
3. to remain loyal or faithful to someone or something
She kept constant in her support despite all the criticism.
Ela manteve-se constante no seu apoio apesar de todas as críticas.