[ in-fruh ]
/ ˈɪn frə /


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

Origin of infra

1730–40; < Latin infrā; cf. under

Definition for infra (2 of 4)


a prefix meaning “below,” used, with second elements of any origin, in the formation of compound words: infrasonic; infrared.

Origin of infra-

< Latin, representing infrā, adv. or preposition

Definition for infra (3 of 4)

ut infra
[ oo t in-frah; English uht in-fruh ]
/ ʊt ˈɪn frɑ; English ʌt ˈɪn frə /


as (stated or shown) below: used in a book, text, etc.

Definition for infra (4 of 4)

vide infra
[ wee-de in-frah; English vahy-dee in-fruh, vee- ]
/ ˈwi dɛ ˈɪn frɑ; English ˈvaɪ di ˈɪn frə, ˈvi- /


see below (used especially to refer a reader to parts of a text). Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for infra

British Dictionary definitions for infra (1 of 3)

/ Latin (ˈɪnfrə) /


(esp in textual annotation) below; further on

British Dictionary definitions for infra (2 of 3)



below; beneath; afterinfrasonic; infralapsarian

Word Origin for infra-

from Latin infrā

British Dictionary definitions for infra (3 of 3)

ut infra
/ Latin (ʊt ˈɪnfrɑː) /

as below
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

Medical definitions for infra



Inferior to, below, or beneath:infrasonic.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.