# liftoff

/ˈɫɪfˌtɔf/ (US) · /lˈɪftɒf/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/liftoff
Updated: 2026-10-13

## Definition

the moment when a rocket or spacecraft leaves the ground to start its flight.

For teachers: the initial ascent of a rocket, missile, or aircraft from its launch site. Often used to mark the precise moment of departure in aerospace contexts.

## Examples

- The rocket is ready for liftoff.
- Crowds gathered at the viewing site to witness the historic liftoff of the first private lunar mission.
- Engineers monitored the telemetry data closely during the final countdown, ensuring all systems were optimal for a successful liftoff into the upper atmosphere.

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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.