• WordNet 3.6
    • adj phlegmatic showing little emotion "a phlegmatic...and certainly undemonstrative man"
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Webster's Revised Unabridged Dictionary
    • Phlegmatic Abounding in phlegm; as, phlegmatic humors; a phlegmatic constitution.
    • Phlegmatic Generating or causing phlegm. "Cold and phlegmatic habitations."
    • Phlegmatic Not easily excited to action or passion; cold; dull; sluggish; heavy; as, a phlegmatic person.
    • Phlegmatic Watery. "Aqueous and phlegmatic ."
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Century Dictionary and Cyclopedia
    • phlegmatic Of the nature of phlegm; watery; aqueous: as, phlegmatic humors.
    • phlegmatic Generating or causing phlegm.
    • phlegmatic Abounding in phlegm; lymphatic; hence, cold; dull; sluggish; heavy; not easily excited to action or passion; apathetic; cool and self-restrained: as, a phlegmatic temperament. See temperament.
    • phlegmatic Synonyms Frigid, impassive, unsusceptible. See apathy.
    • ***
Chambers's Twentieth Century Dictionary
    • adjs Phlegmatic abounding in or generating phlegm: cold: sluggish: not easily excited
    • ***


Webster's Revised Unabridged Dictionary
L. phlegmaticus, Gr. : cf. F. phlegmatique,
Chambers's Twentieth Century Dictionary
Fr.,—L.,—Gr. phlegma, phlegmatosphlegein, to burn.


In literature:

With a calm and phlegmatic German the case is quite different.
"Blackwood's Edinburgh Magazine - Volume 55, No. 343, May 1844" by Various
She was phlegmatic and slow.
"The Continental Monthly, Vol 2, No 6, December 1862" by Various
Religion is not feeling, because there are many phlegmatic, God-fearing men whose religion consists in good works.
"The Approach to Philosophy" by Ralph Barton Perry
Bocardo paid no attention to the threatening demonstration of his associate, but sat phlegmatically silent.
"The Tiger Hunter" by Mayne Reid
They were not seized by any quick panic; they were too phlegmatic for that.
"Pharaoh's Broker" by Ellsworth Douglass
Phlegmatic people seldom psychometrize clearly, and usually lack receptivity to the finer forces.
"Genuine Mediumship or The Invisible Powers" by Bhakta Vishita
Wide open eyes, with the white visible, I have often observed both in the timid and phlegmatic, and in the courageous and rash.
"The World's Greatest Books - Volume 15 - Science" by Various
He sees how Vandyck is chafing, but he is puzzled by the little lawyer's phlegmatic acceptance of the situation.
"The Diamond Coterie" by Lawrence L. Lynch
But the phlegmatic Englishman won't lead in that degringolade.
"The Convert" by Elizabeth Robins
The Duke was a ton of a little man with the phlegmatic Dutch face.
"A Daughter of Raasay" by William MacLeod Raine

In news:

More often than not they're muddily recorded "greatest hits" packages that require the artist (and, by extension, the listener) to compete with rattling cutlery and phlegmatic patrons.
"The Queen Will Be Phlegmatic".
The Four T's has its own mini-narrative: a three-part Theme and then four Variations — Melancholic, Sanguinic, Phlegmatic, Choleric — each treating the Theme 's three parts.
It can be pretty funny to watch phlegmatic Portlanders deal with the whimsy .