Ready-made means extremely convenient or useful for a particular purpose. Those wishing to study urban development have a ready-made example on their doorstep. Everyday object selected and designated as art. The name was coined by Marcel Duchamp, whose first ready-mades included a snow shovel that he picked up on a snowy day in New York, and a wheel mounted on a stool (1913). They represented a protest against the excessive importance attached to works of art. Duchamp's anti-aesthetic gestures made him one of the leading Dadaists of his day, and his ready-made concept, though widely regarded for decades as an insult to art, was adapted by such later artists as Robert Rauschenberg, Andy Warhol, and Jasper Johns
item that is ready to use at the time of purchase or receipt; everyday object displayed as a work of art
If something that you buy is ready-made, you can use it immediately, because the work you would normally have to do has already been done. We rely quite a bit on ready-made meals -- they are so convenient