tantamount

[ tan-tuh-mount ]
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adjective
  1. equivalent, as in value, force, effect, or signification: His angry speech was tantamount to a declaration of war.

Origin of tantamount

1
First recorded in 1635–45; adjective use of obsolete noun, “that which amounts to as much, something equivalent,” itself a noun use of an obsolete verb, “to amount to as much,” from Anglo-French tant amunter or Italian tanto montare “to amount to as much,” from Latin tantum, neuter of adjective tantus “of such size, so great”; see tanto, amount

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See equal.

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How to use tantamount in a sentence

British Dictionary definitions for tantamount

tantamount

/ (ˈtæntəˌmaʊnt) /


adjective
  1. (postpositive foll by to) as good (as); equivalent in effect (to): his statement was tantamount to an admission of guilt

Origin of tantamount

1
C17: basically from Anglo-French tant amunter to amount to as much, from tant so much + amunter to amount

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