Definition of liftoff in English:

liftoff

Syllabification: lift·off
Pronunciation: /ˈliftˌôf, -ˌäf
 
/

noun

  • Takeoff, especially the vertical takeoff of a rocket or helicopter.
    More example sentences
    • The launch timing is dictated by both the position of the space station and NASA's desire to hold a daylight lift-off so it can photograph the spacecraft during its climb to orbit and watch out for possible damage.
    • If all goes well with the test, the countdown will continue to a lift-off at 16: 39 CEST on Tuesday.
    • The next two lift-offs occurred around the 17th.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space