beanie

Short definition from Wiktionary

Noun

1. 1
   A cap that fits the head closely, usually knitted from wool.
2. 2
   A head-hugging brimless cap, with or without a visor, made from triangular sections of cloth, leather, or silk joined by a button at the crown and seamed together around the sides.
3. 3
   A Beanie Baby, a small soft toy filled with beans or similar stuffing.