Definition of triplex in English:


Syllabification: tri·plex
Pronunciation: /ˈtripleks, ˈtrī-


  • 1North American A building divided into three self-contained residences.
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    • The certificate is currently only required for triplexes and apartments.
    • He said he wants to see a moratorium on housing demolition and the construction of triplexes until the impact of the increased density allowances are better understood by council and area residents.
    • The pony-tailed property owner had previously bought and sold properties without incident and had successfully bid on two triplexes in the Pointe.
  • 1.1An apartment or other residence on three floors.
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    • The local health department issues permits for systems serving single-family homes, duplexes, or triplexes.
    • The pony-tailed property owner had previously bought and sold properties without incident and had successfully bid on two triplexes in the Pointe.
    • We were looking for a duplex or a triplex, but triplexes are really hard to come across.
  • 1.2A movie theater with three separate screening rooms.
    More example sentences
    • Although it closed down in 1980, it was reopened as a triplex in 1985 by Landmark Theatres, the nation's largest art-house theater circuit.
    • It's a triplex (three theatres in one building) with each theatre being fairly small; certainly smaller than your standard theatre.
  • 2 Biochemistry A triple-stranded polynucleotide molecule.
    More example sentences
    • Later it was found that homopurine strands can also specifically form a DNA triplex in which the AT base pair is contacted by an A and the GC base pair by a G.
    • The inverted repeat sequences of the guanine-rich 5'-half are expected to have a higher potential of forming the hairpin triplex.
    • This involves formation of a hybrid triplex by two PNA strands and a homopurine strand of dsDNA whereas the other DNA strand is displaced from the double helix.


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  • Having three parts, in particular (of a residence) on three floors: his vast triplex apartment
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    • ‘We have to have great conditions, but with 45 holes, including a 9-hole executive course, I need more efficiency than I would get with triplex mowers,’ he says.
    • For example, we have duplicate platforms in the triplex mowers but we have to target that while retaining functionality for all the markets.
    • But specific features such as bedknife-to-reel knobs on the walk-behinds and an offset cutting-unit design on the triplex mowers can ensure you get the best cut possible.


(be triplexed) Back to top  
  • (Of electrical equipment or systems) be provided or fitted in triplicate so as to ensure reliability.
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    • Diplexed and triplexed types have a single cable input which is selectively split to the outlet sockets.
    • A single coaxial feed runs from the riser switch to the lounge triplexed plate with an extension to the Master Bedroom.
    • Although it was triplexed in 1982, the interior was mostly preserved.


early 17th century (as an adjective in the sense 'threefold'): from Latin, 'threefold', from tri- 'three' + plicare 'to fold'. Current specific senses date from the 1920s.

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