Also means
a great deal
Usage Note
Tantissimo is the superlative of tanto ('so much / a lot') and is used as an intensifying adverb or adjective: mi piace tantissimo ('I like it very much'), ha tantissimi amici ('he has very many friends'). As an adjective it agrees in gender and number (tantissima gente, tantissimi soldi). In speech it often replaces moltissimo without meaningful difference in register.
Examples
"Mi è piaciuto tantissimo il concerto."
Natural Translation
I liked the concert very much.
Literal Translation
To-me pleased very-much the concert.

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