What does “syllabys” mean?

“Syllabys” is a common misspelling of the noun “syllabus.” The correct spelling is S-Y-L-L-A-B-U-S.

It is commonly typed like this because it’s either a misspelling (because of a mispronunciation of the word) or a typo (because the U and Y keys are right next to each other).

Scribbr’s free Grammar Checker will notice and correct typos like this in all of your online documents.