/tæntˈɒmɪnt/ US /tænˈtɒmənt/ UK

Definitions

1. noun

something that is almost but not quite equal to something else; a substitute or equivalent

“The lack of funding was tantamount to abandoning the project.”

2. adverb

equivalent in effect or significance

“His absence from the meeting was tantamount to a resignation.”

3. preposition

equivalent in effect or significance

“Her silence was tantamount to admitting defeat.”

4. verb

to be equivalent in effect or significance

“The company’s actions were tantamount to stealing from its customers.”