Simple Definition of phlegmatic

from our Learner's Dictionary

phlegmatic

adjective

flɛgˈmætɪk

literary : not easily upset, excited, or angered

our phlegmatic leader

She was phlegmatic [=calm] even during the most difficult moments of the crisis.

Cite this Entry

Style

“Phlegmatic.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/phlegmatic. Accessed 22 Jun. 2026.

Copy Citation

More from Merriam-Webster

Word of the Day

cavalcade

Listen to the pronunciation of cavalcade

See Definitions and Examples »

Get Word of the Day daily email!

Popular in Grammar & Usage

'Canceled' or 'cancelled'?

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?

Popular in Wordplay

One-Word Oxymorons: Bittersweet, Spendthrift, and More

8 Obscure Words for Sleepy Times

Cattywampus, Taradiddle, and More Funny-Sounding Words

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World

Popular

'Canceled' or 'cancelled'?

One-Word Oxymorons: Bittersweet, Spendthrift, and More

8 Obscure Words for Sleepy Times