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
extrā outside, beyond, changed from extera, from exterus outward
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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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
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