Tantamount/ˈtæntəmaʊnt/ Definition 1 of 1Pro Tip 1/3Grave Consequences Use 'tantamount' to describe actions with severe outcomes as if they are equal. Ignoring the evacuation order was tantamount to risking their lives. Pro Tip 2/3Serious Allegations 'Tantamount' often precedes a very serious accusation or charge in discussions. His betrayal was tantamount to sabotage against the company. Pro Tip 3/3Implicit Comparison 'Tantamount' implies a comparison, indicating two things are virtually the same in effect. For a public figure, silence is tantamount to consent.