What does «a la derecha» mean in Spanish?

Rightward, clockwise (left to right); dextrorsum.

Examples of use in Spanish: "este tipo de tuerca se desenrosca a la derecha, porque es de gas".
Right side.

Examples of use in Spanish: "está sentado a la derecho de él".
To the right.

Examples of use in Spanish: "dobla aquí a la derecha".