Definition of hub in English:



  • 1The central part of a wheel, rotating on or with the axle, and from which the spokes radiate.

    • ‘Ventilation is often achieved by using wheel hubs from clapped-out vehicles as protective grilles.’
    • ‘In all cases these wheels appear to be solid wooden discs with a thickened hub.’
    • ‘Rocker arms and clutch hubs are examples of automotive production parts that are surface hardened by induction.’
    • ‘Instead, a few species are like hubs, with spokes radiating out to the other species.’
    • ‘The amount of power dissipated in even a standard steel ball bearing hub is quite small.’
    • ‘If we do, there is the danger that the hub nuts will come off and then the wheels drop off.’
    • ‘We stop to flip up our windshield, free the front axle hubs, and shift to high-range.’
    • ‘Key components, including the rotor blades, gearboxes and rotor hubs, will be built at the company's British base.’
    • ‘The legs of the standard are apart sufficiently to take the outer end of the wheel hub, as shown.’
    • ‘Close inspection showed a catastrophic failure of two of the main wheel hub bolts.’
    • ‘There is a farmer's tip/bonfire of burnt plastic, wool, stock mark spray, and wheel hubs.’
    • ‘The front wheel doubles as a paddle wheel and has no hub but instead tracks along its rim.’
    • ‘The barrel of the cannon passed through the reduction gearbox and the propeller hub.’
    • ‘Now we are keeping that going, and working on some other parts that are new to us - pedals, cranks, hubs and wheels.’
    • ‘The hub of the wheel is also the largest single steel casting ever made.’
    • ‘Remove your wheels, and wipe them down, since the dirt gets lodged in the little nooks and crannies of the wheel hubs and spokes.’
    • ‘Eventually though, I end up with shredded hubs, broken spokes and cracked rims.’
    • ‘With a great leap, he landed on the hub of the wheel and grabbed the flapping reins.’
    • ‘Dirt roads also eat the magnets, which activate the trailer brakes in the hubs of the trailer axle.’
    • ‘What is the durability data for ceramic bearings in bicycle hubs?’
    pivot, axis, fulcrum, centre, centre point
    View synonyms
  • 2The effective center of an activity, region, or network.

    ‘the city has always been the financial hub of the country’
    ‘Denver became a regional economic hub for a large part of the western United States’
    ‘the kitchen was the hub of family life’
    • ‘Today, the area around the vast pond is the hub of commercial activity in the city.’
    • ‘This playgroup also acts a central social hub for mothers to make contact, share problems and ideas.’
    • ‘Services can go out from a central hub, to the communities needing them, when they need them.’
    • ‘He said that he expected that the region would become an international hub of tourism.’
    • ‘It serves to provide a central hub for documents and information related to biodiversity.’
    • ‘Using this method an eight-wire connection runs from each machine to a central hub.’
    • ‘Leipzig was one of the earliest book publishing hubs in both Germany and Central Europe.’
    • ‘For centuries this quaint location has been a hub of activity; that of natural forces and that of man.’
    • ‘We should find more hubs and semi - hubs in the discussions forums network then at other networks.’
    • ‘The way is now clear to increase car-parking and make the centre the hub of Carlow town.’
    • ‘The prosecution had opened the case that the defendants were at the hub and that others were the spokes of the conspiracy.’
    • ‘The Government High School becomes a hub of activities on Saturday and Sunday evenings.’
    • ‘Clubs need to be innovative, family friendly and at the hub of local activity.’
    • ‘He said Thailand simply attracted a lot of tourists because of its position as a hub of the region.’
    • ‘The cable was one of the main links between Croydon and Telehouse, the telecoms hub in central London.’
    • ‘Even as she got older and became physically less able, she was still as sharp as a button and the central hub for all of us.’
    • ‘They were the hubs around which the wheels of the villages revolved.’
    • ‘Traffic was halted in business hubs in the central, southern and northern parts of the city.’
    • ‘The ground floor is the hub of the activity as it is the main banking hall.’
    centre, centre of activity, core, heart, focus, focal point, middle, nucleus, kernel, nerve centre
    View synonyms
    1. 2.1A central airport or other transport facility from which many services operate.
      ‘some new flights are being based in cities that are not traditional international hubs’
      ‘the city's major transportation hub for bus and rail’
      [as modifier] ‘major hub airports have grown up all over the world’
      • ‘Meanwhile, flood waters trapped commuters at City Gate, since the roads into the transit hub remained impassable for hours even after the rains had stopped.’
      • ‘Australia needs to develop a northern aviation hub to capitalise on regional tourism and transport opportunities.’
      • ‘The creation of a modern accessible transport hub is an essential part of the overall redevelopment of Sheffield city centre.’
      • ‘Another transit hub, Sunny Bay Station in Hong Kong, takes advantage of sea breezes to cool the building.’
      • ‘Johannesburg's transport hub is in the inner city: about 800,000 commuters pass through it every day.’
      • ‘This is one of the nation's busiest transit hubs.’
      • ‘The quayside location is convenient to a range of city centre employment and transport hubs, with Tara Street and Barrow Street Dart stations located nearby.’
      • ‘Until their CEO climbed into the cockpit in 1997, Air France had done little to develop its Paris hub.’
      • ‘Historically, major hub airports have grown up all over the world on the back of airlines which were dominant national flag carriers.’
      • ‘Plymouth is a transportation hub for the South West of England.’
      • ‘The carriers were accused of fixing prices on fares through 34 hub airports.’
      • ‘Circular Quay is the transportation hub of Sydney Harbour.’
      • ‘All flights, including domestic, charter and cargo, will shift to the new airport, which will play a major role in boosting the role of Thailand as a regional aviation hub.’
      • ‘But, increasingly, even the staunchest environmentalists are advocating plans to build up cities near transit hubs in order to curb sprawl and limit emissions of greenhouse gases.’
      • ‘The study urges communities to concentrate growth around urban and town centers and transportation hubs, a policy known as smart growth.’
      • ‘The transportation hub is financed chiefly with a $1.9 billion grant from the federal agency.’
      • ‘Air-Scotland's plans to develop a hub in Scotland require considerable investment.’
      • ‘We look forward to developing another hub that would service our island.’
      • ‘We're a neighborhood restaurant that draws from all over the city because we're directly across the street from the public transit hub.’
      • ‘At present, London is the world's chief aviation hub.’


Early 16th century (denoting a shelf at the side of a fireplace used for heating pans): of unknown origin (compare with hob).