"duplex" in the noun sense

1. duplex house, duplex, semidetached house

a house with two units sharing a common wall

2. duplex apartment, duplex

an apartment having rooms on two floors that are connected by a staircase

"duplex" in the verb sense

1. duplex

change into a duplex

"duplex" in the adjective sense

1. duplex

used technically of a device or process) having two parts

"a duplex transaction"

2. duplex

allowing communication in opposite directions simultaneously

"duplex system"

"duplex telephony"

Source: WordNet® (An amazing lexical database of English)

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