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Definitions

impermissible

[im-per-mis-uh-buhl] / ˌɪm pərˈmɪs ə bəl /
ADJECTIVE
forbidden
Synonyms
WEAK
banned closed closed-down closed-up contraband no-no off-limits out of bounds proscribed refused taboo verboten vetoed

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.

Chamber of Commerce, said swift “refunds of the impermissible tariffs” would help more than 200,000 small-business importers.

From The Wall Street Journal • Feb. 22, 2026

Judges doesn’t discuss every possible impermissible activity that exists under the sun.

From Slate • Dec. 11, 2025

Circuit Court of Appeals held in 2022 that “the prosecution of foreign nationals traveling on such a vessel for a violation of U.S. law is impermissible under the Felonies Clause of the Constitution.”

From The Wall Street Journal • Dec. 8, 2025

It was also alleged to be an impermissible attempt to circumvent the legislation by effectively making another application for an off-licence.

From BBC • Jan. 29, 2025

Supreme Court announced its decision: Life imprisonment without parole sentences imposed on children convicted of non-homicide crimes is cruel and unusual punishment and constitutionally impermissible.

From "Just Mercy" by Bryan Stevenson