completely; utterly (esp in the phrase diametrically opposed)
WordReference Random House Learner's Dictionary of American English © 2025
di•a•met•ri•cal•ly /ˌdaɪəˈmɛtrɪkli/USA pronunciation
adv.
WordReference Random House Unabridged Dictionary of American English © 2025- in direct opposition;
at opposite extremes:diametrically opposed opinions.
di•a•met•ri•cal
(dī′ə me′tri kəl),USA pronunciation adj.
di′a•met′ri•cal•ly, adv.
- Mathematicsof, pertaining to, or along a diameter.
- in direct opposition;
being at opposite extremes;
complete:diametrical opposites; a diametrical difference.
- Greek diametrik(ós) (diámetr(os) diameter + -ikos -ic) + -al1
- 1545–55
Collins Concise English Dictionary © HarperCollins Publishers::
'diametrically opposed' also found in these entries (note: many are not synonyms or translations):