Meaning of UNCERTAINTY in English
un ‧ cer ‧ tain ‧ ty /ʌnˈsɜːtnti $ -ˈsɜːr-/ BrE AmE noun ( plural uncertainties )
[ Word Family: noun : ↑ certainty ≠ ↑ uncertainty ; adverb : ↑ certainly ≠ ↑ uncertainly ; adjective : ↑ certain ≠ ↑ uncertain ]
1 . [uncountable] when you feel doubt about what will happen:
Times of great change are also times of uncertainty.
uncertainty about/as to
There is a great deal of uncertainty about the company’s future.
2 . [countable usually plural] a situation which you are not sure about because you do not know what will happen:
the uncertainties of old age
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012