| Noun | 1. | duplex - a house with two units sharing a common wallhouse - a dwelling that serves as living quarters for one or more families; "he has a house on Cape Cod"; "she felt she had to get out of the house" | |
| 2. | duplex - an apartment having rooms on two floors that are connected by a staircaseapartment, flat - a suite of rooms usually on one floor of an apartment house | |
| Adj. | 1. | duplex - (used technically of a device or process) having two parts; "a duplex transaction"multiple - having or involving or consisting of more than one part or entity or individual; "multiple birth"; "multiple ownership"; "made multiple copies of the speech"; "his multiple achievements in public life"; "her multiple personalities"; "a pineapple is a multiple fruit" | |
| 2. | duplex - allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony"bidirectional - reactive or functioning or allowing movement in two usually opposite directions | |