Definition of crucially in US English:

crucially

adverb

  • With decisive or vital importance.

    ‘a question that may have crucially influenced the decision’
    sentence adverb ‘crucially, recipients of these funds would be required to place their work in the public domain’
    as submodifier ‘both movies are crucially dependent on the performance of the male lead’
    • ‘Knowledge is crucially different from mere true belief.’
    • ‘His defense was crucially based on his assertion that he was completely unaware that Egypt had cultural patrimony laws of any kind.’
    • ‘His family history and life had been crucially shaped by political events in Cuba.’
    • ‘In a state of crisis, information becomes crucially important.’
    • ‘More crucially, the details of his accident refuse to cohere.’
    • ‘A generation of British artists themselves were crucially indebted to Matisse at a formative stage of their careers.’
    • ‘Crucially, there are few moments of contrasted musical ideas being offset against each other.’
    • ‘The political independence of any country is crucially dependent upon its economic independence.’
    • ‘Crucially, the director lets us sense these characters' isolation in relation to others.’
    • ‘Unfortunately the lack of on-screen chemistry between the two actors crucially lets the dramatic element of the film down.’

Pronunciation

crucially

/ˈkro͞oSHəlē//ˈkruʃəli/