WordReference Random House Unabridged Dictionary of American English © 2026
four•plex
(fôr′pleks, fōr′-),USA pronunciation n. [Archit.]
- Building, Architecturequadplex.
- four + -plex, abstracted from duplex (apartment), in place of quadruplex 1970–75
'fourplex' also found in these entries (note: many are not synonyms or translations):