1. （捕鲸等用的）鱼镖，鱼叉，捕鲸叉
A harpoon is a long pointed weapon with a long rope attached to it, which is fired or thrown by people hunting whales or large sea fish.

2. 用鱼叉捕获（鲸鱼等）
To harpoon a whale or large fish means to hit it with a harpoon.

1. a spear with a shaft and barbed point for throwing
used for catching large fish or whales
a strong line is attached to it