"hedgehog" as noun
1 - A small mammal, of the family Erinaceidae or subfamily Erinaceinae (spiny hedgehog, the latter characterized by their spiny back and often by the habit of rolling up into a ball when attacked.)
2 - Any of several spiny mammals, such as the porcupine, that are similar to the hedgehog.
3 - A type of moveable military barricade made from crossed logs or steel bars, laced with barbed wire, used to damage or impede tanks and vehicles; Czech hedgehog.
"hedgehog" as verb
1 - To make use of a hedgehog barricade as a defensive maneuver.
2 - To array with spiky projections like the quills of a hedgehog.
3 - To curl up into a defensive ball.
