A home equipped with an automation system controlling such things as lighting, climate, entertainment systems, and appliances.

A municipality that uses information and communications technology, such as electronic sensors, to increase efficiency and improve the quality of services.

A device that plugs into a standard wall socket and allows further devices to be plugged into it. The on/off state can then be controlled remotely via an app.

(slang, US, dated) A large amount, a great deal.

(nautical, now historical) A certificate given to wounded seamen, entitling them to smart money. / An e-ticket.

A kind of guided missile. / (military aviation) A guided air-dropped bomb. / (video games) A weapon that damages or kills all enemies within a large area.

(simile) Very intelligent.

(Canada, US, informal) Very intelligent.

(politics) The combination of hard power and soft power strategies.

Having knowledge obtained by reading and studying, rather than by practical experience.