A spike is a long piece of metal with a sharp point.

Any long pointed object can be referred to as a spike .

If there is a spike in the price, volume, or amount of something, the price, volume, or amount of it suddenly increases.

Spikes are a pair of sports shoes with pointed pieces of metal attached to the soles. They help runners' feet to grip the ground when they are running.

If your drink is spiked, someone has added alcohol or drugs to it without telling you.