A coupler is a device or connector that joins two things together. It is used to link or attach different parts of a machine or system, allowing them to work together as a single unit. Full definition
The major lot by Sherman in the auction is Lot 47, «Untitled # 225,» a color coupler print mounted on foamcore, 48 by 33 inches, that depicts Sherman as a demure, not particularly beautiful, Botticelliesque woman bearing a breast spurting milk.» (thecityreview.com)
Left: Martin Beck, We dismantle abandoned bridges..., 2012 Framed color coupler print Gift of the artist to Julie Ault, 2012 (contemporaryartdaily.com)
Thus, even without the mechanical Haldex coupler for drive distribution, Volkswagen refers to the AWD capability as «4MOTION». (greencarcongress.com)