What is the meaning of Somma?

A volcanic caldera that has been partially filled by a new central cone.

third-person singular past historic of sommer

sum, amount

addition, sum

gist, essence, sum, conclusion

summit, pinnacle, top, peak (the highest point)

a learned exposition, typically theological or philosophical

feminine singular of sommo (“highest, greatest”)

inflection of sommare:

1. third-person singular present indicative
2. second-person singular imperative

third-person singular present indicative

second-person singular imperative

sum, total

Source: wiktionary.org