English Reference
Noun

jailbreak

n. countable
C1 Advanced US /ˈdʒeɪɫˌbɹeɪk/ UK /dʒˈeɪlbɹeɪk/ jail·break UK spelling jailbreaks Computing

n.the act of removing software restrictions on a device like a phone or tablet. This lets you install apps or change settings that the manufacturer usually blocks.

n.the process of removing software restrictions imposed by the manufacturer on a device's operating system. This typically involves exploiting security vulnerabilities to gain root access, allowing the installation of unauthorized software.


SIMPLE

He performed a jailbreak on his old phone to install custom themes.

CONTEXTUAL

After the latest jailbreak was released, many users modified their tablets to run third-party applications not found in the official store.

COMPLEX

While a jailbreak offers greater customization and control over the hardware, it often voids the manufacturer's warranty and may leave the device vulnerable to security threats.

Usage

Often used as a compound noun in computing; can also function as a verb.

He’s been falsely accused of aiding and abetting a jailbreak and is facing imminent eviction from his rented family home.

The Guardian· 3 Sept 2026

From jail + break.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Occasional
Updated