Definition of all-important in English:

all-important

adjective

  • Vitally important; crucial.

    ‘the town's all-important tourist industry’
    • ‘In addition, the all-important transitions between scenes were often too slow as well.’
    • ‘But, when it comes to selling a house, the grubby topic of money is all-important.’
    • ‘Back then people had more to fear from a simple introduction than just screwing up the all-important first impression.’
    • ‘Friendship with oneself is all-important, because without it one cannot be friends with anyone else in the world.’
    • ‘Seven years ago, the all-important decision to build the new centre was made - and there would be no looking back.’
    • ‘Most of the tips are useful, such as how to maximise networking potential and where to find those all-important contacts.’
    • ‘In many ways, such figures were all-important in helping to shape the New Left.’
    • ‘Once or twice a couple of us even managed to sneak in and get that all-important present from the man with the white beard.’
    • ‘This was a man who had no intention of allowing any error to distract from his all-important evidence in defence of the Government.’
    • ‘So long as the horse was all-important in war, the upper classes were all-important, because they could ride.’
    • ‘He flew back to Mumbai on time to be with Suzanne on their all-important day.’
    • ‘An extra two per cent could have catapulted me from an E in chemistry to that all-important D.’
    • ‘Of course, even when we've made that all-important investment decision, it's still not finished.’
    • ‘Therefore this is your last opportunity to make that all-important gift or cash donation to the charity.’
    • ‘So it could be an important part of a Tory manifesto, but not the all-important issue.’
    • ‘That ideologues can pump up small things and make them seem all-important is very old news.’
    • ‘Why, without these all-important ingredients there was no romance, she insisted.’
    • ‘Of course, the all-important marketing skill was tellingly lacking in Murthy.’
    • ‘The all-important goal came ten minutes from the finish from Oliver Gordon.’
    • ‘Do, however, stay on the phone for a few seconds after the all-important beep, and sigh audibly into the receiver.’
    vital, essential, indispensable, crucial, key, necessary, needed, required, requisite, important, vitally important, of the utmost importance, of great consequence, of the essence, critical, life-and-death, imperative, mandatory
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Pronunciation

all-important

/ɔːlɪmˈpɔːt(ə)nt/