1. the quality of being impossible to predict or forecast; the state of changing in ways that cannot be anticipated

Examples

• The unpredictability of the weather made planning the outdoor event difficult.
• Stock market unpredictability can make investors nervous.
• She enjoyed the unpredictability of traveling without a fixed itinerary.
• The coach was frustrated by his team’s unpredictability on the field.
• The unpredictability of her mood swings concerned her family.
• Scientists study the unpredictability of earthquake timing.
• The unpredictability of the exam questions caught many students off guard.