1. twofold; double.
2. having two apartments, divisions, or floors.
3. relating to or being a single assembly of machinery having two identical units that are capable of operating simultaneously or independently.
4. electronics of or relating to a communications mode, as in a telephone system, that provides simultaneous transmission and reception in both directions.
5. A house divided into two living units or residences, usually having separate entrances.
6. something, such as an apartment, that is duplex.

1. double, made up of two parts
2. two direction (electronical signaling)
3. house made up of two dwelling units
4. a cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.
5. throwing motion where two balls are thrown with one hand at the same time.
6. to make duplex.
7. to make into a duplex.
8. to make a series of duplex throws.

1. double; twofold.
2. organized so that data may be transmitted in two opposite directions over the same channel; -- of communications channels, such as data transfer lines between computers.
3. something which is duplex; -- used mostly in reference to a living unit, such as an apartment, in a building having two similar living units.
4. a double-stranded region in a nucleic acid molecule. see deoxyribonucleic acid.
5. to arrange, as a telegraph line, so that two messages may be transmitted simultaneously; to equip with a duplex telegraphic outfit.

1. double; twofold.
2. A doubling or duplicating.
3. in telegraphy, to arrange (a wire) so that two messages may be transmitted along it at the same time.
4. to transmit telegraphic messages by the duplex system.

1. a house with two units sharing a common wall
2. change into a duplex
3. (used technically of a device or process) having two parts
4. an apartment having rooms on two floors that are connected by a staircase
5. allowing communication in opposite directions simultaneously