WordReference Random House Unabridged Dictionary of American English © 2026
sim•plex
(sim′pleks),USA pronunciation adj., n. pl. -plex•es, -pli•ces
adj.
n.
-
(-plə sēs′).USA pronunciation
adj.
- simple;
consisting of or characterized by a single element. - pertaining to or noting a telecommunications system permitting communication in only one direction at a time.
n.
- Mathematicsa 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.
- Buildingan apartment having all the rooms on one floor.
- 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
- 1585–95
'simplex' also found in these entries (note: many are not synonyms or translations):
HSV-1
- HSV-2
- Mormon cricket
- cold sore
- complice
- genital herpes
- haplo-
- herpes
- herpes simplex
- herpesvirus
- idoxuridine
- kainic acid
- oral herpes
- semplice
- similar
- simple
- simplex method
- simplicidentate
- simplicity
- simul
- single