|1.||[ noun ] (housing) a house with two units sharing a common wall|
|2.||[ adjective ] (telecommunication) allowing communication in opposite directions simultaneously|
"duplex system" "duplex telephony"
|Related terms:||telecommunication bidirectional|
|3.||[ adjective ] (used technically of a device or process) having two parts|
"a duplex transaction"
|4.||[ noun ] (housing) an apartment having rooms on two floors that are connected by a staircase|