1. the quality of being urgent or pressing; urgency
Usage: formal; somewhat archaic
2. the quality of being immediate or occurring without delay
Usage: formal; literary

Examples

• The instancy of the situation required immediate action.
• She was struck by the instancy of his response to her letter.
• The instancy of the emergency left no time for deliberation.
• His plea carried an instancy that could not be ignored.
• The instancy of the deadline made everyone work overtime.
• There was an instancy in her voice that demanded attention.