the person in charge
Je pense que c'est Tom le responsable.
I think Tom is responsible.
Je ne suis pas le responsable de ça.
I'm not responsible for that.
I was the one responsible.
Elle exigea de voir le responsable.
She demanded to see the person in charge.
Tu vois toujours le responsable de la centrale électrique ?
Do you still see the person in charge of the power plant?
I want to see the person in charge.