WordReference Random House Unabridged Dictionary of American English © 2026
quad•ru•plex
(kwod′rŏŏ pleks′, kwo dro̅o̅′pleks),USA pronunciation adj.
- fourfold;
quadruple. - Telecommunicationsnoting or pertaining to a system of telegraphy by which four messages may be transmitted simultaneously over one wire or communications channel.
- Latin; see quadru-, -plex
- 1870–75
'quadruplex' also found in these entries (note: many are not synonyms or translations):