What is Freeganism?

Legal Definition
Freeganism is a practice and ideology of limited participation in the conventional economy and minimal consumption of resources, particularly through recovering wasted goods like food. The word "freegan" is a coinage derived from "free" and "vegan". While vegans might avoid buying animal products as an act of protest against animal exploitation, freegans—at least in theory—avoid buying anything as an act of protest against the food system in general.

Freeganism is often presented as synonymous with "dumpster diving" for discarded food, although freegans are distinguished by their association with an anti-consumerist and anti-capitalist ideology and their engagement in a wider range of alternative living strategies, such as voluntary unemployment, squatting abandoned buildings, and "guerilla gardening" in unoccupied city parks.
-- Wikipedia
Legal Definition
The practice of liberal salvage, product reuse, bartering, and making products by hand. It is a lifestyle encouraging minimal consumption and little use of a capitalist economy.