- for similar but more convincing reasons
WordReference Random House Unabridged Dictionary of American English © 2026
a for•ti•o•ri
(ä fōr′ti ō′rē; Eng. ā fôr′shē ôr′ī, ā fōr′shē ōr′ī),USA pronunciation [Latin.]
- Foreign Termsfor a still stronger reason;
even more certain;
all the more.
Collins Concise English Dictionary © HarperCollins Publishers::
a fortiori /eɪ ˌfɔːtɪˈɔːraɪ; -rɪ; ɑː/ adv