Word Origin a prefix meaning “outside,” “beyond,” freely used as an English formative: extrajudicial; extraterritorial; extra-atmospheric. Origin of extra-
Latin, combining form of extrā (adv. and preposition) outside (of), without
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for extra- outside or beyond an area or scope extrasensory; extraterritorial Word Origin for extra-
extrā outside, beyond, changed from extera, from exterus outward
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 extra-
only recorded in classical Latin in
extraordinarius, but much used in Medieval Latin and modern formations; it represents Latin extra (adv.) "on the outside, without, except," the old fem. ablative singular of exterus "outward, outside," comparative of ex "out of" (see ex-).
Online Etymology Dictionary, © 2010 Douglas Harper
extra- Outside; beyond: extracellular.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.