Tan"ta*mount` (?), a. [F. tant so much (L. tantus) + E. amount.]
Equivalent in value, signification, or effect.
A usage nearly tantamount to constitutional right.
Hallam.
The certainty that delay, under these circumstances, was tantamount to ruin.
De Quincey.
© Webster 1913.
Tan"ta*mount`, v. i.
To be tantamount or equivalent; to amount.
[Obs.]
Jer. Taylor.
© Webster 1913.