Definition of belt up in English:

belt up

British informal
  • 2Put on a seat belt: all youngsters will have to belt up in cars, vans, and lorries
    More example sentences
    • We want people to feel uncomfortable if they have not belted up; wearing a seat belt is part of driving,’ she said.
    • Ford Dealers of Ireland are supporting the National Safety Council in a new seatbelt campaign aimed at encouraging the 43% of Irish motorists who never wear a seatbelt to belt up.
    • More than 55,500 unborn babies could be at risk every year because mums-to-be are not belting up in their cars, fearing it could harm their children, according to new research.
See parent entry: belt

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Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody