say it: SIR-ee-uh-slee
seriously is an adverb meaning "in a serious manner". It carries 2 recorded senses.
in a serious manner
“talking earnestly with his son”
“she started studying snakes in earnest”
“a play dealing seriously with the question of divorce”
Definitions, synonyms and semantic relations for seriously come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.