Definitions:

1. One who enforces confinement in a jail or prison. NOUN
   • The jailer conducted routine checks throughout the night to prevent any escape attempts.
2. Person responsible for the custody, supervision and management of inmates in a jail or prison. NOUN
   • The jailer escorted the new inmate to his cell and explained the rules of the facility.
3. Person that ensures that prisoners follow rules, maintains order within the facility, and prevents escapes. NOUN
   • As a jailer, her primary responsibility was to maintain order and ensure the safety of all inmates.

Synonyms:

• correction officer
• prison guard
• Prison officer