Parole is release from prison before a sentence is finished, granted on conditions, while probation is a sentence served in the community instead of prison in the first place. A useful hook: parole comes from a word for a prisoner's given word, so parole is what happens after prison; probation is what happens instead of it.
The core difference
Parole is conditional early release from prison, while probation is a sentence that avoids prison altogether, under supervision.
- parole — the early, conditional release of a prisoner who agrees to follow certain rules and report to an officer: He was granted parole after serving two-thirds of his sentence.
- probation — a criminal sentence that allows someone to remain in the community under supervision instead of going to prison: She was sentenced to two years of probation instead of jail time.
How to tell them apart
The order of events is the key. Probation is handed down as the sentence itself, so the person never goes to prison for that offence as long as they keep to the conditions. Parole comes later, after someone has already served part of a prison term, and lets them finish their sentence outside under supervision.
Parole traces back to a French word meaning word or formal promise, reflecting the idea that a prisoner gives their word to behave. Probation shares its root with probe and prove, since it was originally a period of testing someone's conduct. This pairing shows up often in crime reporting, where headlines can blur the two very different points in the justice process they describe.
