Definitions
1.noun(collective) A group of fish or a group of marine mammals such as porpoises, dolphins, or whales."The divers encountered a huge school of mackerel."
2.nounA multitude.
3.nounThe main bones of the head considered as a unit; including the cranium, facial bones, and mandible.
4.nounA symbol for death; death's-head
5.nounThe mind or brain.
6.nounA crust formed on the ladle, etc. by the partial cooling of molten metal.
7.nounThe crown of the headpiece in armour.
8.nounA shallow bow-handled basket.
9.verbTo hit in the head with a fist, a weapon, or a thrown object.
10.verbTo strike the top of (the ball).