the central part of a wheel, rotating on or with the axle, and from which the spokes radiate, a center of activity or interest or commerce, especially a focal point of transportation

hub and spoke, hub of the universe, hub cap

Formal and Informal Expressions of hub

In different contexts, you can replace 'hub' with suitable alternatives. In a more formal setting, 'center, focal point' is apt. In informal speech or writing, 'hotspot, nerve center' is a commonplace synonym.

hub: Explore its Definition & Usage

hub Definition

1the central part of a wheel, rotating on or with the axle, and from which the spokes radiate
2a center of activity or interest or commerce, especially a focal point of transportation

Using hub: Examples

Take a moment to familiarize yourself with how "hub" can be used in various situations through the following examples!

Example
The hub of the wheel is connected to the axle.
Example
New York City is a hub for international business.
Example
The airport is a major transportation hub.
Example
The city's downtown area is a hub of activity.

hub Synonyms and Antonyms

Synonyms for hub

Phrases with hub

hub and spoke
a system of air transportation in which local airports offer flights to a central airport where long-distance flights are available
Example
The airline operates a hub-and-spoke system out of its main airport.
hub of the universe
a place that is considered to be the most important or central place in the world
Example
Boston was once called the hub of the universe because of its importance in trade and commerce.
hub cap
a decorative cover for the wheel hub of a motor vehicle
Example
He lost one of his hubcaps while driving on the highway.

Origins of hub

from Middle English 'hubb', meaning 'the nave of a wheel'

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Summary: hub in Brief

The term 'hub' [hʌb] refers to the central part of a wheel, from which the spokes radiate. It also denotes a center of activity or interest, particularly in transportation, as in 'The airport is a major transportation hub.' Phrases like 'hub and spoke' describe transportation systems, while 'hub cap' refers to a decorative cover for a wheel hub.