Equivalent in effect or value: a request tantamount to a demand. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "tantamount" in a sentence
"It began when the band refused permission for their music to be covered by the Glee cast, which they described as tantamount to "selling out"."
"He faced a wave of criticism for saying Monday that Texas would treat Federal Reserve Chairman Ben Bernanke "ugly" if he pursues more stimulus -- an action he described as tantamount to treason."
"I consider the regime's retreat in the matter of women's political participation-which at one point it called tantamount to prostitution-an extremely positive point."