Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “mercurial”

mercurial

adjective uk   /mɜːˈkjʊə.ri.əl/ us    /mɜːrˈkjʊr.i-/

mercurial adjective (quick)

literary changing suddenly and often: a mercurial temperament She was entertaining but unpredictable, with mercurial mood swings. literary intelligent, enthusiastic, and quick: a mercurial mind/wit

mercurial adjective (related to mercury)

specialized medical containing or caused by mercury: mercurial drugs
(Definition of mercurial from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of mercurial?
Browse related topics

You are looking at an entry to do with Changing frequently, but you might be interested in these topics from the Changing and not changing topic area:

Add Cambridge dictionaries to your browser to your website

Translations of “mercurial”

Word of the Day

for starters

used to say that something is the first in a list of things

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