uncertainty

1. (uncountable) Doubt; the condition of being uncertain or without conviction.Examples: "“Well,” I answered, at first with uncertainty, then with inspiration, “he would do splendidly to lead your cotillon, if you think of having one.” ¶ “So you do not dance, Mr. Crocker?” ¶ I was somewhat set back by her perspicuity."; "After spending so much of the season looking upwards, the swashbuckling style and swagger of early season Spurs was replaced by uncertainty and frustration against a Norwich side who had the quality and verve to take advantage"; "Piecing together Corbynomics is difficult, not least because it has evolved during Mr Corbyn’s time in charge of Labour. The gulf between the Labour leadership’s past positions and the milder proposals in the manifesto means that enormous uncertainty hangs over what a Corbyn-led government would do in office."uncountable

2. (countable) Something uncertain or ambiguous.Examples: "Despite these uncertainties, Clarke told MPs he was convinced of the need to order trains powered by batteries. He said: "We're calling for a 'no regrets' order of battery trains because we see them always having a future. We see them being fundable, financeable, similar cost to diesel trains, and we know that however much electrification we would aspire to do, there's always going to be at least a third of the network that isn't electrified."countable

3. (uncountable, mathematics) A parameter that measures the dispersion of a range of measured values.uncountable