Definition

The act of killing or destroying a large part of a group or population, often used in the context of war or disaster.

Example

The decimation of the local wildlife was a result of the pollution in the river.

Conversation

Did you hear about the decimation of the local wildlife in that area?

Yeah, it's really sad to see so many animals disappearing.

I read that it was caused by pollution and habitat destruction.

That makes sense; we really need to do more to protect our environment.

Synonyms & Antonyms

Root Explanation

Decimation is formed from "decimus" (meaning tenth) and the suffix "-ation" (indicating an action or process). The term originally referred to the Roman military practice of killing one in every ten soldiers as a punishment for the entire group, thus the word means the act of destroying a large portion of something, particularly in a punitive context.

Memory Tip

Think of the word 'decimus' meaning 'tenth' to remember that 'decimation' refers to the act of destroying a significant part, often one-tenth, of a group.

Visually Confused Words