(nautical) An attachment to the tiller that enables the helmsman to steer from further forward on the boat.

(electronics, US) An electrical cord with a plug one end, and a single socket or a multi-port socket at the other end, used for powering one or more devices at a distance, too far from the wall outlet to be reached by the normal cords of the device or devices.

A cable that can be used to extend a signal or power cable or move the connexion point for a signal or power source.

plural of extension cable

A length of hair which is attached to one's normal hair to make it longer.

plural of filename extension

(computing) A file extension.

plural of file extension

plural of leg extension

(weightlifting) An exercise performed on a machine while seated. The quadriceps (thigh muscles) are exerted to straighten the knee while acting against resistance applied to the lower shin.