Chasm – A very deep opening in rock, ice, or the ground

To remember the definition of the word chasm, use the following mnemonic:

In front of the castle, Mum (chasm) didn't notice the deep opening in the ground and almost fell in.

Examples of chasm in a sentence

Local legend said there was a monster living in the chasm, but he didn't believe them.

The chasm was so deep, no one had yet been able to reach the bottom.

What looked like a giant chasm to the ant was really just a small crack in the pavement.