a prefix occurring in loanwords from Latin (transcend; transfix); on this model, used with the meanings “across,” “beyond,” “through,” “changing thoroughly,” “transverse,” in combination with elements of any origin: transisthmian; trans-Siberian; transempirical; transvalue.
Chemistry. a prefix denoting a geometric isomer having a pair of identical atoms or groups on the opposite sides of two atoms linked by a double bond.Compare cis-(def 2).
Astronomy. a prefix denoting something farther from the sun (than a given planet): trans-Martian; trans-Neptunian.
a prefix meaning “on the other side of,” referring to the misalignment of one’s gender identity with one's biological sex assigned at birth: transgender; transsexual.
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Origin of trans-
< Latin, combining form of trāns (adv. and preposition) across, beyond, through
Words nearby trans-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for trans-
sometimes before s- tran-
across, beyond, crossing, on the other sidetransoceanic; trans-Siberian; transatlantic
(often in italics) indicating that a chemical compound has a molecular structure in which two groups or atoms are on opposite sides of a double bondtrans-butadiene Compare cis- (def. 2)
Word Origin for trans-
from Latin trāns across, through, beyond
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 trans-
Across; on the other side; beyond:transilient.
Having a pair of identical atoms on opposite sides of two atoms linked by a double bond. Used of a geometric isomer. Usually in italic:trans-butene.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.