Definition

1. Noun:
   • A center of activity, interest, commerce, or transportation; a focal point: A hub is a central and most important place where there is a lot of activity or where particular activities are coordinated.
   • The central part of a wheel, fan, or propeller: In mechanics, a hub is the central part of a rotating device (like a wheel) that connects to the axle or shaft.

Usage Examples

• As a center of activity:

  • The city's main square is the social hub, always full of people.
  • The new innovation district aims to become a hub for tech startups.
  • The kitchen is the hub of activity in our home during the holidays.

• As a mechanical part:

  • The mechanic replaced the damaged hub of the bicycle wheel.
  • Ensure the propeller hub is securely fastened before starting the engine.

Advanced Usage

• "At the hub of": Being the central and most important part of something.
  • She found herself at the hub of the company's restructuring efforts.
• "Hub-and-spoke system": A transportation system where traffic moves along spokes connected to a central hub.
  • Many airlines use a hub-and-spoke model, with major airports like Atlanta or Dubai as their hubs.

Variants and Related Words

• Hubby (noun): An informal, affectionate term for "husband." (Note: This is a separate, colloquial word, not a variant of "hub").
• Hubless (adjective): Describing a wheel (especially on motorcycles) that appears to have no central hub, as the braking mechanism is on the rim.

Synonyms

• Center: The middle point or main area of activity.
• Core: The central or most important part.
• Nucleus: A central part around which other parts are collected.
• Focal point: The center of interest or activity.
• Pivot: A central point, pin, or shaft on which a mechanism turns or oscillates.

Related Phrases

• Hub of the universe: (Idiomatic, often humorous or ironic) A place considered to be the most important center of activity.
  • He acts like his tiny office is the hub of the universe.

Notes on Meaning

The word "hub" powerfully combines a literal, physical meaning (the center of a wheel) with a very common figurative meaning (a center of activity). The figurative sense derives from the idea that all "spokes" of activity lead to and from this central point.

Noun

1. a center of activity or interest or commerce or transportation; a focal point around which events revolve
   • the playground is the hub of parental supervision
   • the airport is the economic hub of the area
2. the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes