# all systems go

idiom

Source: https://englishreference.com/idiom/all-systems-go
Updated: 2026-08-10

## Meaning

Everything is ready.

## Examples

- Everything is ready and it is all systems go.
- The team finished the final checks, so it is all systems go for the launch tomorrow morning.
- With the final safety protocols verified and the crew in position, the mission control director declared that it was all systems go for the historic flight.

## Origin

Originally used in the aerospace industry, the phrase was established to indicate a collective preparedness for a rocket launch. It served as a verbal confirmation that each individual component was functioning correctly and that the operation was ready to proceed.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.