Definition of "duplex"

Double; made up of two parts.

1. (architecture) Having two floors.  examples

2. (architecture) Having two units, divisions, suites, or apartments.  examples

3. (metallurgy) Of stainless steel: having a structure containing austenite and ferrite in roughly equal proportions.  quotations  examples

   Quotations

   • Duplex stainless steels have been classified according to the first period (1930–1960) and second period (1960–1990). The designations for these duplex alloys in the United States have been primarily according to Unified Numbering System (UNS) numbers in the S3xxx.x series.

     2010, Harold M. Cobb, The History of Stainless Steel, Materials Park, O.H.: ASM International, page 189

(telecommunications) Bidirectional (in two directions).  examples

(soil science) Having horizons with contrasting textures.  quotations  examples

(US, Canada) A house made up of two dwelling units.  quotations  examples

(US) A dwelling unit with two floors.  examples

(philately) A cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.  examples

(juggling) A throwing motion where two balls are thrown with one hand at the same time.  examples

(biochemistry) A double-stranded polynucleotide.  examples

(geology) A system of multiple thrust faults bounded above and below by a roof thrust and floor thrust.  quotations

To make duplex.  examples

To make into a duplex.  examples

(juggling) To make a series of duplex throws.  examples