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 Theo James had previously worked with Osgood Perkins on a horror series that didn’t achieve liftoff, but their collaboration ended up bearing fruit anyway in the form of The Monkey. Brian Davids, The Hollywood Reporter, 21 Feb. 2025 In a Falcon 9 rocket, the first stage separates from the second stage about 2 minutes and 30 seconds after liftoff. Clara Harter, Los Angeles Times, 20 Feb. 2025 Editor's note: This story was updated at 6:30 p.m. EST with news of successful liftoff. Mike Wall, Space.com, 18 Feb. 2025 The first-stage booster made a successful 21st liftoff, but was expended to get the satellite to a geosynchronous transfer orbit. Richard Tribou, Orlando Sentinel, 15 Feb. 2025 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 12 Mar. 2025.

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