(US) The screaming crowds near Wellesley College during the annual Boston Marathon.

A kind of motor vehicle road rally for high-performance vehicles, emphasizing recreational driving in a group, especially through tunnels.

A device used to form an image of the surface of a conductor or semiconductor with atomic resolution.

plural of scanning tunneling microscope

(idiomatic) A better situation after long hardship. / A vision of a bright light, surrounded by darkness, seen by a dying person

(neurology) form of repetitive stress injury caused by compression of the median nerve travelling through the carpal tunnel.

(business) The application of a rigorous testing regime to a new corporate idea, structure or project to see if it is viable and fit for purpose.

(rail transport) A railway station and junction in Monmouthshire, Wales, on the west side of the Severn Tunnel, which serves the village of Rogiet (OS grid ref ST4687).

plural of tunnel boring machine

(engineering) A large machine used to excavate tunnels with a circular cross section.