Equivalent in seriousness to; virtually the same as.
‘the resignations were tantamount to an admission of guilt’
‘The report stated that much of what had been done to them was tantamount to genocide.’
‘Forcing a publisher to publish something against their will is tantamount to censorship.’
‘What do you say to those who equate modern art with nihilism and say its very existence is tantamount to the death of art?’
‘Remember, refusal to give a thumb print is tantamount to a confession.’
‘You’d be pretty angry if your salary didn’t go up in line with inflation each year, because it would be tantamount to a pay cut.’