toxic.

1. Capable of harming through poisonous chemical action.

2. Destructive to well-being or relationships.

Use it for

Words that belong together

• toxic substance

On the page

The sample released a toxic substance.

The gas was toxic at that concentration.

Usage notes

Primary category: horror. Forms: Comparative more toxic; superlative most toxic where gradation is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.