im ‧ men ‧ si ‧ ty /ɪˈmensəti, ɪˈmensɪti/ BrE AmE noun ( plural immensities )
1 . [uncountable and countable] used to emphasize the great size of something, especially something that cannot be measured
immensity of
the immensity of outer space
2 . [uncountable] used to emphasize the great size and seriousness of something such as a problem you have to deal with or a job you have to do
immensity of
the immensity of the problem