S, s

/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.