[{"Bold_text": "noun", "List Items": ["the central part of a wheel, as that part into which the spokes are inserted.", "the central part or axle end from which blades or spokelike parts radiate on various devices, as on a fan or propeller.", "a center around which other things revolve or from which they radiate; a focus of activity, authority, commerce, transportation, etc.:Chicago is a railroad hub.Synonyms: heart , pivot , core", "the Hub,Boston, Massachusetts (used as a nickname).", "the peg or hob used as a target in quoits and similar games.", "any one of the holes in an electrical panel, into which connections may be plugged.", "Computers.a device connecting others in a network and enabling communication among them by receiving data packets from any of the devices and broadcasting them to every device on the network irrespective of the intended destination: used primarily in small local area networks.Compare switch(def6a) switch(def6a).", "Coining.a design of hardened steel in relief, used as a punch in making a die.", "Surveying.a stake bearing a tack used to mark a theodolite position.", "Metalworking.a die forced into a metal blank."]}, {"Bold_text": "verb (used with object)", "List Items": ["Metalworking.to stamp (a metal blank) with a hub."]}]