CAFO or Confined Animal Feeding Operation (aka Concentrated Animal Feeding Operation), is, according to Sustainable Table, “an agricultural business where animals are raised in confined situations and fed an unnatural diet, instead of allowing them to roam and graze.”
These can be huge, containing thousands of chickens, cattle, or pigs.
You may very well hear CAFO as an adjective: “Oh, ick! A menu full of CAFO meat. I’ll be having the veggieburger!”
From "Eat Where You Live", Copyright © 2008 by Lou Bendrick.