1. in a way that spreads out or is scattered over a wide area rather than concentrated
2. in a way that is wordy, unclear, or lacking focus; without conciseness

Examples

• The light from the lamp spread diffusely throughout the room.
• The author explained the concept diffusely, making it hard to follow the main argument.
• Heat radiates diffusely from the surface rather than in a single direction.
• He spoke diffusely about his plans, jumping from topic to topic without clear organization.
• The ink dissolved diffusely in the water, creating a soft gradient of color.
• The report was written diffusely, requiring readers to extract the key points themselves.