a. Covered in fur.
b. Similar in texture or appearance to fur.
2. n. An anthromorphic animal.
3. n. A person who is to any degree interested in (read: not necessarily wants to yiff) animals, which can range from animals with the ability to speak to those with very humanlike bodies.
Some furries are quite fond of (read again: not always yiff) plushies and, less commonly, dressing up in a fursuit that either depicts their fursona/favorite animal or just a giant plushie.
Many tend to write stories/poetry about or draw their fursona or any other anthromorphic creature. Some, I may add, are quite good at it.
Any other sub-culture on this planet is just as prone or moreso to harm children as furries are, so why and how the "all furries are dangerious to children" rumor has spread remains unknown.
Note that not all furries are disgusting middle aged men who are unemployed and create a better imaginary self-image for the sake of getting...