simplex has definitions from the field of telecommunications
[ adjective ] (telecommunication) allowing communication in only one direction at a time, or in telegraphy allowing only one message over a line at a time


"simplex system"

Used in print

(Edwin L. Bigelow and Nancy H. Otis,...)

The old Morse system was replaced locally by the Simplex modern automatic method in 1929 , when Ellamae_Heckman ( Wilcox ) was manager of the Western_Union office .

[ adjective ] having only one part or element


"a simplex word has no affixes and is not part of a compound--like `boy' compared with `boyish' or `house' compared with `houseboat'"

Related terms

simple simple