Other forms: pointier; pointiest
Anything that's pointy has a sharp, tapered end, like a pair of high-heeled shoes with uncomfortably pointy toes.
Some pointy things are sharp enough to be dangerous, like kitchen knives, swords, and daggers, all of which taper to an extremely pointy tip. But plenty of objects you'd also describe as pointy aren't quite so treacherous, from your cat's pointy ears to your sister's witch hat she wears every year on Halloween. Pointy is from the Latin pungere, "to pierce." In the 20th century, calling an overly intellectual person "pointy-headed" was a common insult.