Definition of jump off in English:

jump off

  • (Of a military campaign) begin: the air-attack phase will continue before the ground attack jumps off
    More example sentences
    • On the morning of 13 May, the 6th Marine Division attack was scheduled to jump off at 0730.
    • The attack jumped off six hours later.
    • The final assault jumped off at 1515 from a crossroads 500 yards south of Clochimont.
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Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody