1. in a completely opposite way; at opposite extremes
Usage: often used with ‘opposed’

Examples

• The two candidates hold diametrically opposed views on healthcare.
• Their approaches to solving the problem were diametrically different.
• The twins have diametrically opposite personalities.
• His new opinion is diametrically opposed to what he said last year.
• The results were diametrically contrary to our expectations.
• Their values are diametrically opposed on this issue.