adjective \ˈtan-tə-ˌmant\

: equal to something in value, meaning, or effect

Full Definition of TANTAMOUNT

:  equivalent in value, significance, or effect <a relationship tantamount to marriage>

Examples of TANTAMOUNT

  1. His statement was tantamount to an admission of guilt.
  2. They see any criticism of the President as tantamount to treason.


obsolete tantamount, noun, equivalent, from Anglo-French tant amunter to amount to as much
First Known Use: 1641


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