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.
TPPRead more in this article about some frequently asked questions and fun facts related to our definitions.
MOCRead more in this article about some frequently asked questions and fun facts related to our definitions.
- trans female,
- trans male,
- trans man,
- trans person,
- trans woman,
- trans-alaska pipeline,
- trans-fatty acid
Origin of trans-
< Latin, combining form of trāns (adv. and preposition) across, beyond, through
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
prefix meaning "across, beyond, to go beyond," from Latin trans-, from prep. trans "across, over, beyond," probably originally present participle of a verb *trare-, meaning "to cross" (see through).
Online Etymology Dictionary, © 2010 Douglas Harper
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.