/es/ , n. , pl. 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.