Definition of Urchin

Urchin

1. A hedgehog.
2. A sea urchin. See Sea urchin.
3. A mischievous elf supposed sometimes to take the form a hedgehog.
4. A pert or roguish child; -- now commonly used only of a boy.
5. One of a pair in a series of small card cylinders, arranged around a carding drum; -- so called from its fancied resemblance to the hedgehog.
6. Rough; pricking; piercing.