• WordNet 3.6
    • n turndown the act of refusing an offer "the turndown was polite but very firm"
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Webster's Revised Unabridged Dictionary
    • Turndown (Elec) Capable of being turned down;
    • Turndown Made to wear with the upper part turned down; as, a turndown collar.
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Century Dictionary and Cyclopedia
    • turndown Folded or doubled down.
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In literature:

Turndown, piccadilly, or roll collars are not authorized.
"Manual for Noncommissioned Officers and Privates of Infantry of the" by War Department
He was of stalky build, carefully shaved that morning, and wore a dingy turndown collar.
"The She Boss" by Arthur Preston Hankins
He's got an angels-ever-bright-and-fair expression, smiles to turn milk, dog's eyes, and a turndown collar.
"A Man in the Open" by Roger Pocock
Turndown, piccadilly, or roll collars are not authorized.
"Manual for Noncommissioned Officers and Privates of Cavalry of the Army" by U. S. War Department
The flies are usually tied on Pennell hooks, turndown eye, sizes 0, 00, 000, Kendal scale, which are smaller than No.
"Bass, Pike, Perch, and Others" by James Alexander Henshall

In news:

Redesigned, the Benchmark 3000 (BMK3000) boiler features high turndown for energy efficiency, lower operating costs, and high reliability in a compact footprint.
A Turndown Solution Proves to be City's Upturn.
In conventional activated sludge (CAS) plants that rely on sedimentation, turndown (the effective operating range) is often very limited.
Flagler County, which has been plagued with high unemployment since the economic turndown, saw its unemployment rate dip below 14 percent to 13.9 percent.
Overnight accommodations aboard VIA Rail , Canada's prestigious Silver & Blue coaches, include turndown service, showers, tea, freshly prepared meals.
An Ooh Là Là Romance Package add-on includes a special turndown service with robes, music and lighting.
With a wide flow range turndown of 50:1, it is ideal for applications where there are large variations in flow rates.
A Turndown Solution Proves to be City's Upturn .
As turndown ratios increase, questions of pump efficiency arise.

In science:

The turndown in the predicted inverse-Compton emission from scattering the microwave background radiation occurs because of the assumed lower energy limit of 150 MeV for the electron population.
The X-ray jet and halo of PKS 0521-365
Oemler’s function embrace a family based on a modified Hubble profile with various strengths of a luminosity turndown at large radii.
The Tolman Surface Brightness Test for the Reality of the Expansion. V. Provenance of the Test and a New Representation of the Data for Three Remote HST Galaxy Clusters