infrastructure

noun

in·​fra·​struc·​ture ˈin-frə-ˌstrək-chər 

-(ˌ)frä-

1

: the system of public works of a country, state, or region

also : the resources (such as personnel, buildings, or equipment) required for an activity

2

: the underlying foundation or basic framework (as of a system or organization)

3

: the permanent installations required for military purposes

infrastructural

ˈin-frə-ˌstrək-chə-rəl  -ˌstrək-shrəl 

-(ˌ)frä-

adjective

Did you know?

Infra- means "below;" so the infrastructure is the "underlying structure" of a country and its economy, the fixed installations that it needs in order to function. These include roads, bridges, dams, the water and sewer systems, railways and subways, airports, and harbors. These are generally government-built and publicly owned. Some people also speak about such things as the intellectual infrastructure or the infrastructure of science research, but the meaning of such notions can be extremely vague.

Synonyms

• structure
• architecture
• framework

Examples of infrastructure in a Sentence

More money is needed to save the crumbling infrastructure of the nation's rural areas.

We need to spend more money on maintaining and repairing infrastructure.

Recent Examples on the Web

On a recent trip to West Virginia, a reporter saw numerous roundabouts in relatively high traffic areas that appeared to lack infrastructure geared toward pedestrian safety. —Eric D. Lawrence, USA Today, 28 Sep. 2025

Tipsword said Illinois’ new limits on police involvement in mental-health crisis calls are being rolled out without the infrastructure to keep first responders safe. —Center Square, The Washington Examiner, 27 Sep. 2025

The goal of the flyovers is to sow fear and division, Danish Minister of Justice Peter Hummelgaard said Thursday, adding that the country will seek additional ways to neutralize drones, including proposing legislation to allow infrastructure owners to shoot them down. —Preston Fore, Fortune, 27 Sep. 2025

Hotter ocean temperatures breed bigger, more intense storms, which in turn can cause more severe flooding, infrastructure damage and loss of life. —Alana Wise, NPR, 27 Sep. 2025

Word History

First Known Use

1927, in the meaning defined at sense 2

Rhymes for infrastructure

• macrostructure
• microstructure
• nanostructure
• superstructure
• ultrastructure
• restructure
• substructure
• structure

Kids Definition

infrastructure

noun

in·​fra·​struc·​ture ˈin-frə-ˌstrək-chər 

1

: the underlying foundation or basic framework (as of a system or organization)

2

: the system of public works of a country, state, or region

also : the resources (as people, buildings, or equipment) required for an activity