Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “caustic”

caustic

adjective uk   /ˈkɔː.stɪk/ us    /ˈkɑː-/

caustic adjective (CHEMICAL)

describes a chemical that burns or destroys things, especially anything made of living cells: a caustic substance

caustic adjective (WORDS)

describes a remark or way of speaking that is hurtful, critical, or intentionally unkind: caustic comments She's famous in the office for her caustic wit.
caustically
adverb uk   /ˈkɔː.stɪ.kəl.i/ us    /ˈkɑː-/
(Definition of caustic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of caustic?
Browse related topics

You are looking at an entry to do with Unkind, cruel & unfeeling, but you might be interested in these topics from the Kind and unkind topic area:

Add Cambridge dictionaries to your browser to your website

More meanings of “caustic”

Definitions of “caustic” in other dictionaries

Word of the Day

maiden

a girl or young woman

Word of the Day

Countability – grammar codes

by Dom Glennon​​,
November 26, 2014
Advices and informations Have you ever noticed strange codes in square brackets on entries in Cambridge Dictionaries Online and wondered what they mean? These are grammar codes, giving you a brief summary of how that word behaves grammatically. More information can be obtained by hovering your cursor over the code, and there’s

Read More 

ped-text verb

November 24, 2014
to text someone while walking I’m ped-texting, I’m looking down at my phone, 75 percent of the time.

Read More