a mesh of wire, usually galvanized, with a hexagonal pattern, generally used for making fences, especially for enclosures for small farm animals and pets
You'll recall that normally any old hen had sense enough not to run or fly into a chicken wire fence, but the same old hen at the sight of a hawk would lose all judgment about fences, and plunge headlong into it..
Chicken wire is a type of thin wire netting. A light-gauge galvanized wire fencing usually made with hexagonal mesh. a type of thin wire net used to make fences for chickens (Because it is used for making a fence around an area where chickens are kept)