An example of tantamount is when an omission is viewed as the same thing as a lie.
Origin of tantamount; from Anglo-French tant amunter, to amount to as much ; from Old French tant (; from Classical Latin tantus, so much: see tandem) + amonter (see amount)
Origin of tantamountFrom obsolete tantamount, an equivalent, from Anglo-Norman tant amunter, to amount to as much : tant, so much, so great (from Latin tantum, neuter of tantus, from tam, so; see to- in Indo-European roots) + amunter, to amount to, variant of Old French amonter; see amount.
(third-person singular simple present tantamounts, present participle tantamounting, simple past and past participle tantamounted)
- (obsolete) To amount to as much; to be equivalent.
- (obsolete) Something which has the same value or amount (as something else). (attributive use passing into adjective, below)
(comparative more tantamount, superlative most tantamount)
- Equivalent in meaning or effect.
- It's tantamount to fraud.
- In this view, disagreement and treason are tantamount.
Tantamount is used almost exclusively in the phrase tantamount to, but may also be used by itself.
From Anglo-Norman tant amunter.