Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “toxic”


poisonous: toxic to sb/sth These substances can be toxic to humans.toxic chemical/substance/material The company has cut toxic chemicals from its printing process.
very unpleasant or unacceptable: The atmosphere at work had become positively toxic.
(Definition of toxic from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of toxic?
Browse related topics

You are looking at an entry to do with Difficult situations and unpleasant experiences, but you might be interested in these topics from the Easy and difficult topic area:

Add Cambridge dictionaries to your browser to your website

More Business English definitions for “toxic”

Definitions of “toxic” in other dictionaries

Word of the Day


to press something quickly and quite hard between two objects, especially sharp objects such as teeth or nails

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More