noun, plural S's or Ss, s's or ss. 1.the 19th letter of the English alphabet, a consonant.
2.any spoken
sound represented by the letter
S or
s, as in
saw, sense, or
goose. 3.something having the shape of an S .
4.a written or printed representation of the letter S or s.
5.a device, as a printer's type, for reproducing the letter S or s.