Diffusion: meaning, definitions and examples

Often used in scientific contexts to describe how particles or substances move from an area of high concentration to an area of low concentration.

• The diffusion of the dye in the water created a beautiful gradient
• Gas exchange in the lungs happens through diffusion

Used to describe the process of distributing things or people over a wide area, often in a more technical or mathematical context.

• The dispersion of light through a prism creates a rainbow
• The dispersion of the population across the region is uneven

A general term that can be used in a variety of contexts to describe something expanding over an area or increasing in influence.

• The spread of the disease was faster than anticipated
• The spread of the rumor caused unnecessary panic

Typically used to describe the spread of information, knowledge, or ideas, especially in a formal or academic setting.

• The dissemination of research findings is crucial for scientific progress
• The charity focused on the dissemination of health education materials

Typically used in scientific or technical contexts to describe the process of particles spreading from an area of high concentration to an area of low concentration.

• The diffusion of molecules across the cell membrane is essential for nutrient uptake

Used in general contexts to describe something extending over a larger area or among more people, including diseases, news, or objects.

• The spread of the flu this winter has been quite severe

Commonly used to describe the act of conveying something from one person, place, or thing to another, especially in the context of diseases, signals, or energy.

• The transmission of the virus can occur through direct contact or inhalation of airborne particles

Often used in contexts involving the spread of waves, signals, or information, especially in physics and telecommunications.

• The propagation of radio waves can be affected by atmospheric conditions

Use 'diffusion' when referring to the process where particles spread out evenly in a space, notably in liquids and gases, or when ideas and innovations spread through cultures and societies.

• The diffusion of tea from China to Europe transformed European beverage culture
• The diffusion of perfume molecules in the air creates a pleasant aroma in the room

Use 'dispersion' when indicating the act of distributing or spreading out things or people over a wide area, often used in environmental science and physics.

• The dispersion of pollutants in the atmosphere poses a significant challenge for air quality control
• Light dispersion through a prism creates a rainbow of colors

Use 'migration' to describe the large-scale movement of people, animals, or other organisms from one place to another, often for survival, breeding, or seasonal change.

• The annual migration of birds to warmer regions is a fascinating natural phenomenon
• Human migration has shaped the history and culture of many countries

Use 'permeation' to discuss the process where a substance slowly spreads through or penetrates another substance, often used in scientific and industrial contexts.

• The permeation of water into the soil is crucial for plant growth
• The permeation of the smell of freshly baked bread through the house made everyone hungry