What is the meaning of Serio?

neuter of seriu

series

serious

earnest

dative/ablative masculine/neuter singular of sērius

serious (without humor or expression of happiness)

in earnest, seriously

seriously, wholeheartedly

for real, seriously (let's be serious)

vocative singular of seria

first-person singular present indicative of seriar

pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) of sério

serious, earnest, sober, solemn (without humor)

serious, grave, deep (important, weighty)

serious (really intending what was said)

straight (demeanor)

staid (formal)

first-person singular present indicative of seriar

Source: wiktionary.org