An unpredictable person or thing whose behavior or outcome cannot be foreseen.
Examples:
- We don't know how the new pitcher will do—he's an unknown quantity.
Origin: Mid-1800s figuratively; from algebra, where it signifies an unknown numerical value
An unpredictable person or thing whose behavior or outcome cannot be foreseen.
Examples:
Origin: Mid-1800s figuratively; from algebra, where it signifies an unknown numerical value