Definition of 13:

• the cardinal number that is the sum of twelve and one
• being one more than twelve

Usage examples for 13

1. 13. What are spoken words?  A Handbook of Health by Woods Hutchinson

2. 13. The people returned from work, no Sinataevaeva was there, Tangaloa called for his daughters Darkness, Lightning, and Thunder, And ordered them off in search of his wife.  Samoa, A Hundred Years Ago And Long Before by George Turner

3. Escaped ex- convict Welch on No. 13 from New York.  McAllister and His Double by Arthur Train

4. 7 and 13 which you have already received by registered post, I can put you in full possession of the whole.  Uncanny Tales by Mary Louisa Molesworth