as in launch
a rising from a surface at the start of a flight (as of a rocket) everyone was quiet in the control room as they waited for lift-off

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Recent Examples of liftoff Blue Origin pushed again its planned debut launch of its New Glenn rocket from the Space Coast, now targeting an early Monday morning liftoff. Richard Tribou Orlando Sentinel (tns), arkansasonline.com, 13 Jan. 2025 Second stage hydrogen loading will begin 4.5 hours before liftoff, followed by the booster stage and second stage liquid oxygen at 4 hours, and methane for the booster stage at 3.5 hours to go. Eric Berger, Ars Technica, 11 Jan. 2025 The satellites were successfully deployed about 35 minutes after liftoff and are bound for a final geosynchronous orbit about 22,236 miles (35,786 kilometers) above Earth. Tariq Malik, Space.com, 29 Dec. 2024 On the second flight, the nozzle fell off one of Vulcan's solid rocket boosters shortly after liftoff, but the rocket successfully continued its climb into orbit. Ars Technica, 20 Dec. 2024 See all Example Sentences for liftoff 

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“Liftoff.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/liftoff. Accessed 21 Jan. 2025.

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