infra

1 of 2

adverb

in·​fra ˈin-frə How to pronounce infra (audio)
 also  -ˌfrä
: later in this writing : below
for additional examples see infra

infra-

2 of 2

prefix

1
: below
infrahuman
infrasonic
2
: within
infraspecific
3
: below in a scale or series
infrared

Word History

Etymology

Adverb

Latin

Prefix

Latin infra — more at under

First Known Use

Adverb

circa 1740, in the meaning defined above

Time Traveler
The first known use of infra was circa 1740

Dictionary Entries Near infra

Cite this Entry

“Infra.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infra. Accessed 6 Dec. 2022.

Kids Definition

infra-

prefix

: below in a scale or series
infrared

Legal Definition

infra

adverb

: in the following text : below
see textual discussion accompanying note 22 infra D. Q. Posin
used in books, articles, and cases to refer the reader to later pages, sections, or footnotes of the text
compare idem, supra

More from Merriam-Webster on infra

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