S 19th letter of the English alphabet and a letter employed in the alphabets of other w European languages, It is descended from the Semitic letter sin or shin, a name meaning tooth, which had a sound somewhat like the modern English sh. The Greeks had various letters for sibilants, but after about 600 bc they used mainly sigma for s . The letter as we know it today achieved its final form after adoption into the Latin alphabet. In modern English, the two common pronunciations of s are voiced ... 33 meanings: 1. the 19th letter and 15th consonant of the modern English alphabet 2. a speech sound represented by this letter,.... Click for more definitions. " S " is the nineteenth letter in the English alphabet. It is a consonant. S , nineteenth letter of the modern Latin alphabet. It corresponds to the Semitic sin “tooth.” The Greek treatment of the sibilants that occur in the Semitic alphabet is somewhat complicated. The Semitic samech appears in Greek as Ξ (xi) with the value in early times of /ss/, later and more