double-blind
adjective
dou·ble-blind
ˌdə-bəl-ˈblīnd 
: of, relating to, or being an experimental procedure in which neither the subjects nor the experimenters know which subjects are in the test and control groups during the actual course of the experiments compare open-label, single-blind
Examples of double-blind in a Sentence
Recent Examples on the Web
The company’s approach was tested in a double-blind clinical trial involving 1,400 participants in Israel, conducted in collaboration with Tel Aviv Sourasky Medical Center, Rambam Health Care Campus and Hadassah Medical Center.
—
Sindhya Valloppillil, Forbes.com, 1 July 2025
In a 2019 randomized, double-blind study involving adults with chronic stress, those who took ashwagandha extract for 60 days had significantly lower cortisol levels compared to the placebo group (participants taking a substance of no therapeutic value).
—Sarah Jividen, Verywell Health, 26 June 2025
Any effort to replace true experts who rely on randomized double-blind clinical trials with other members who may have political or conspiracy bias is a disaster waiting to happen.
—Dp Opinion, Denver Post, 23 June 2025
In a Phase 3, double-blind, randomized study, there were only two HIV infections among 2,179 participants who received Yeztugo subcutaneous injections twice a year.
—Joseph Choi, The Hill, 18 June 2025
Over three years, researchers planted more than 8,000 trees and shrubs across four square miles in a double-blind study and tracked residents’ health.
—Bill Frist, Forbes.com, 4 June 2025
Articles appear in scholarly journals, and books are published by university presses, only after a rigorous, double-blind review process.
—James T. Kloppenberg, Time, 28 May 2025
Another ongoing double-blind, randomized clinical trial, called ADDRESS-LC, will test a different, more specific immunomodulator called bezisterim for neurocognitive long COVID.
—The Washington Post, San Diego Union-Tribune, 27 May 2025
Experts have pushed back against this claim about vaccine testing, pointing to various double-blind studies for inoculations against MMR, polio and the flu, among others.
—Joseph Choi, The Hill, 8 May 2025
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Sindhya Valloppillil, Forbes.com, 1 July 2025
In a 2019 randomized, double-blind study involving adults with chronic stress, those who took ashwagandha extract for 60 days had significantly lower cortisol levels compared to the placebo group (participants taking a substance of no therapeutic value).
—Sarah Jividen, Verywell Health, 26 June 2025
Any effort to replace true experts who rely on randomized double-blind clinical trials with other members who may have political or conspiracy bias is a disaster waiting to happen.
—Dp Opinion, Denver Post, 23 June 2025
In a Phase 3, double-blind, randomized study, there were only two HIV infections among 2,179 participants who received Yeztugo subcutaneous injections twice a year.
—Joseph Choi, The Hill, 18 June 2025
Over three years, researchers planted more than 8,000 trees and shrubs across four square miles in a double-blind study and tracked residents’ health.
—Bill Frist, Forbes.com, 4 June 2025
Articles appear in scholarly journals, and books are published by university presses, only after a rigorous, double-blind review process.
—James T. Kloppenberg, Time, 28 May 2025
Another ongoing double-blind, randomized clinical trial, called ADDRESS-LC, will test a different, more specific immunomodulator called bezisterim for neurocognitive long COVID.
—The Washington Post, San Diego Union-Tribune, 27 May 2025
Experts have pushed back against this claim about vaccine testing, pointing to various double-blind studies for inoculations against MMR, polio and the flu, among others.
—Joseph Choi, The Hill, 8 May 2025
Cite this Entry
“Double-blind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/double-blind. Accessed 8 Jul. 2025.
Copy CitationMedical Definition
double-blind
adjective
dou·ble-blind
ˌdəb-əl-ˈblīnd
: of, relating to, or being an experimental procedure in which neither the subjects nor the experimenters know which subjects are in the test and control groups during the actual course of the experiments compare open-label, single-blind
Love words? Need even more definitions?
Merriam-Webster unabridged
Share