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  • infra
    infra
    adverb
    below, especially when used in referring to parts of a text.
  • infra-
    infra-
    a prefix meaning “below,” used, with second elements of any origin, in the formation of compound words.
Synonyms

infra

1 American  
[in-fruh] / ˈɪn frə /

adverb

  1. below, especially when used in referring to parts of a text.


infra- 2 American  
  1. a prefix meaning “below,” used, with second elements of any origin, in the formation of compound words.

    infrasonic; infrared.


infra- 1 British  

prefix

  1. below; beneath; after

    infrasonic

    infralapsarian

"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

infra 2 British  
/ ˈɪnfrə /

adverb

  1. (esp in textual annotation) below; further on

"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

Etymology

Origin of infra1

1730–40; < Latin infrā; cf. under

Origin of infra-2

< Latin, representing infrā, adv. or preposition


Compare meaning

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“We expect renewed investor interests as GLW’s Optical segment opportunities further scale and as the company positions itself as a clean, growth-oriented AI infra investment story,” Yang wrote.

From Barron's ● Feb. 6, 2026

The infra push is also something that will have long-term payoffs.

From BBC ● Apr. 30, 2024

The types of neurofeedback training that Walker practices includes amplitude training, infra low frequency, and Alpha Theta training.

From Seattle Times ● Jul. 12, 2022

Gov. Spencer Cox last month, “is to turn the AG folks into road map not a road block on these large infra projects.”

From Los Angeles Times ● Dec. 16, 2015

When, just before the war, Christian X. and Queen Alexandrina visited Belgium on their accession the German propagandists in Scandinavia were shocked; it was infra dig.

From Ten Years Near the German Frontier A Retrospect and a Warning by Maurice Francis Egan

For Kant, Intuition was infra- intellectual, but for Bergson it is supra-intellectual.

From Bergson and His Philosophy by John Alexander Gunn

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