noun, plural un·cer·tain·ties for 2.
- the state of being uncertain; doubt; hesitancy: His uncertainty gave impetus to his inquiry.
- an instance of uncertainty, doubt, etc.
- unpredictability; indeterminacy; indefiniteness.
noun plural -ties
- Also called: uncertainness the state or condition of being uncertain
- an uncertain matter, contingency, etc
n.late 14c., from uncertain + -ty.