A long wall or embankment built to prevent flooding from the sea or a river. The dike was constructed to protect the town from the rising river waters.
A geological formation consisting of a sheet of rock that is formed in a fracture of a pre-existing rock body. The geologist studied the dike to understand the volcanic activity in the region.
A ditch or trench cut in the ground, especially for drainage or irrigation. They dug a shallow dike alongside the road to carry away rainwater.
(Offensive slang) A lesbian. He was reprimanded for using the slur "dike" to refer to a lesbian.