undetectable

adjective un·de·tect·able \ ˌən-di-ˈtek-tə-bəl , -dē- \

Definition of undetectable

: unable to be detected : impossible to discover or notice : not detectable
  • an almost undetectable change
  • undetectable traces of poison
  • Signs of life may be so minimal as to be undetectable by modern instruments …
  • —Lauren J. Livo

undetectably

play \ˌən-di-ˈtek-tə-blē, -dē-\ adverb
    • an undetectably small change

Recent Examples of undetectable from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'undetectable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of undetectable

1863

in the meaning defined above

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