'Tantamount' definitions:

Definition of 'tantamount'

From: WordNet
adjective
Being essentially equal to something; "it was as good as gold"; "a wish that was equivalent to a command"; "his statement was tantamount to an admission of guilt" [syn: equivalent, tantamount(p)]

Definition of 'Tantamount'

From: GCIDE
  • Tantamount \Tan"ta*mount`\, v. i. To be tantamount or equivalent; to amount. [Obs.] --Jer. Taylor. [1913 Webster]

Definition of 'Tantamount'

From: GCIDE
  • Tantamount \Tan"ta*mount`\, a. [F. tant so much (L. tantus) + E. amount.] Equivalent in value, signification, or effect. [1913 Webster]
  • A usage nearly tantamount to constitutional right. --Hallam. [1913 Webster]
  • The certainty that delay, under these circumstances, was tantamount to ruin. --De Quincey. [1913 Webster]