What is the meaning of Serius?

serious

grave, earnest, serious

comparative degree of sērō

Serious:

  1. Without humor or expression of happiness; grave in manner or disposition.

    Without humor or expression of happiness; grave in manner or disposition.

    Important; weighty; not insignificant.

    Really intending what is said (or planned, etc); in earnest; not jocular or deceiving.

    Used to express disbelief; seriously, for real.

    Source: wiktionary.org