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Definitions

confirmatory

[kuhn-fur-muh-tawr-ee] / kənˈfɜr məˌtɔr i /
ADJECTIVE
affirmative
Synonyms
STRONG
affirmatory approving positive supporting
WEAK
acknowledging acquiescent affirming complying concurring confirmative confirming consenting corroborative endorsing favorable ratifying
Antonyms
WEAK
dissenting negative
ADJECTIVE
collateral
Synonyms
STRONGEST
ancillary
STRONG
accessory adjuvant attendant auxiliary complementary concomitant coordinate dependent incident lateral parallel roundabout satellite side sub subordinate subsidiary supporting tributary
WEAK
accompanying added adjunctive appurtenant circuitous coincident concurrent corresponding corroborative not lineal related subservient under
Antonyms
STRONG
chief different dissimilar important independent major necessary unrelated
WEAK
direct main primary principal

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Analyst David Stanton says this was likely due to concerns about the effect size of the confirmatory trial.

From The Wall Street Journal • Feb. 6, 2026

The best confirmatory follow-up turned out to be a second Galleri test—which is already Grail’s standard approach in its existing sales of Galleri under the FDA exemption for lab-developed blood tests.

From Barron's • Oct. 22, 2025

"I think the urgency and importance of doing the confirmatory work can't be overstated."

From Science Daily • Oct. 19, 2025

“If they’re not willing to do confirmatory sampling, that tells us they’re willing to leave the properties contaminated,” said Jane Williams, executive director of California Communities Against Toxics.

From Los Angeles Times • Feb. 12, 2025

“Of course not” laughed Robert “Of course not” echoed Mariequita, with a serious, confirmatory bob of the head.

From "The Awakening" by Kate Chopin