What does second syllable stressed mean?

Answer 1

It means a word is stressed on the second syllable when it's spoken.

Answer 2

Second syllable stress refers to a pattern of word stress where the second syllable in a word is emphasized more than the first or subsequent syllables. This type of stress pattern is common in some languages, such as Spanish, where words like "banana" (ba-NA-na) or "tomato" (to-MA-te) have stress on the second syllable.