[ in-fruh-struhk-cher ]
/ ˈɪn frəˌstrʌk tʃər /


the basic, underlying framework or features of a system or organization.
the fundamental facilities and systems serving a country, city, or area, as transportation and communication systems, power plants, and schools.
the military installations of a country.

Nearby words

  1. infrasonic,
  2. infrasonics,
  3. infrasound,
  4. infraspecific,
  5. infraspinatus bursa,
  6. infratemporal crest,
  7. infratemporal fossa,
  8. infratrochlear nerve,
  9. infraversion,
  10. infrequency

Origin of infrastructure

First recorded in 1925–30; infra + structure

SYNONYMS FOR infrastructure
Related formsin·fra·struc·tur·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for infrastructural

British Dictionary definitions for infrastructural


/ (ˈɪnfrəˌstrʌktʃə) /


the basic structure of an organization, system, etc
the stock of fixed capital equipment in a country, including factories, roads, schools, etc, considered as a determinant of economic growth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for infrastructural



1887, from French infrastructure (1875); see infra- + structure (n.). The installations that form the basis for any operation or system. Originally in a military sense.

Online Etymology Dictionary, © 2010 Douglas Harper