1. the quality or state of being extended in space; spatial extent or magnitude.
Usage: formal; philosophy
2. in psychology and philosophy, the property of a sensation or perception that relates to its spatial spread or distribution rather than its strength or intensity.
Usage: technical; psychology

Examples

• The extensity of the desert made it difficult to cross on foot.
• Philosophers debate whether extensity is a fundamental property of matter.
• The extensity of a visual field determines how much of the environment we perceive at once.
• The painting's extensity across the entire wall created an immersive experience.
• In sensory studies, extensity refers to how spread out a sensation feels rather than how strong it is.