A system by which health care is available to all citizens of a country irrespective of their ability to pay.
Sometimes called "socialized medicine" it in fact can be provided using a combination of the public and private sector, compulsory insurance with assistance for those who can not afford it, a system funded entirely by taxes, or both.
The USA is the only developed country not to implement universal health care. The current system is very expensive and inefficient, people in the USA pay more than anyone for health care in the first world yet receive treatment on par with third world countries.
French Man 1: You hear ze americans have no "universal healthcare".
French Man 2: Hoh hoh hoh hoh hoh.
French Man 1: Hoh hoh hoh hoh hoh.