- (transitive) to make serious or grave
WordReference Random House Unabridged Dictionary of American English © 2026
so•lem•ni•fy
(sə lem′nə fī′),USA pronunciation v.t., -fied, -fy•ing.
- to make solemn:to solemnify an occasion with hymns and prayers.
- solemn + -ify 1880–85
Collins Concise English Dictionary © HarperCollins Publishers::
solemnify /səˈlɛmnɪˌfaɪ/ vb ( -fies, -fying, -fied)