Illustrated and described is a hinge for releasably and pivotably connecting a wing, in particular in the form of a door and/or a flap, to a base part, in particular in the form of a frame, including: a hinge pin extending along a pin axis, and at least one pin-receiving element, which has a pin receptacle for at least partially receiving the hinge pin, wherein the hinge pin is adjustable relative to the pin-receiving element, at least substantially perpendicularly to the pin axis, between a pivoting position in which it is at least partially received in the pin receptacle and a mounting position in which it is arranged outside of the pin receptacle, wherein the pin-receiving element and the hinge pin are pivotable relative to one another about the pin axis in the pivoting position, and wherein a securing element is provided which is adjustable between a securing position for securing the hinge pin with respect to an unintentional adjustment from the pivoting position into the mounting position at least substantially perpendicularly to the pin axis and a release position for releasing the adjustment, at least substantially perpendicularly to the pin axis, of the hinge pin from the pivoting position into the mounting position. Also illustrated and described is a system having such a hinge.