1. the quality or state of being long in distance or extent
2. the quality or state of being long in duration

Examples

• The longness of the hallway made it seem endless.
• She complained about the longness of the meeting.
• The longness of winter made everyone eager for spring.
• The bridge’s longness was impressive from this viewpoint.
• The longness of his speech tested everyone’s patience.
• We were surprised by the longness of the delay.