simplex
Americanadjective
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simple; consisting of or characterized by a single element.
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pertaining to or noting a telecommunications system permitting communication in only one direction at a time.
noun
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Mathematics. a basic geometric element in a Euclidean space, being a line segment in one dimension, a triangle in two dimensions, a tetrahedron in three dimensions, and so on: used in topology and linear programming.
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an apartment having all the rooms on one floor.
adjective
noun
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linguistics a simple not a compound word
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geometry the most elementary geometric figure in Euclidean space of a given dimension; a line segment in one-dimensional space or a triangle in two-dimensional space
Other Word Forms
Etymology
Origin of simplex
1585–95; < Latin: having a single layer, literally, one-fold, equivalent to sim-, base meaning “one” (akin to similis similar, Greek hén (neuter) one, homós same ( see homo-), English same ) + -plex -plex
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The biotech’s experimental cancer treatment is a genetically engineered version of the Herpes Simplex Virus type 1, the same virus that causes cold sores.
From Barron's • Apr. 10, 2026
"The time has come to launch these funds," said Hiromasa Mizushima, chief executive officer for Simplex Asset Management.
From Reuters • Aug. 30, 2023
In June, Elizabeth’s genetic tests came back, showing that she has EB Simplex, Generalized Severe.
From Washington Post • May 30, 2017
Goalkeeper Simplex Nthala saved an early penalty to deny the Hawks before Moses Chavula struck the only goal.
From BBC • Mar. 26, 2011
But if Simplex had not helped to shove on the sledge they would not have got so far as this.
From Pretty Michal by Jókai, Mór
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
