Dictionary definition of light :
the natural agent that stimulates sight and makes things visible. The presence of photons, electromagnetic radiation of any wavelength that travels in a vacuum with a speed of 299,792,458 meters (about 186,000 miles) per second; specifically : such radiation that is visible to the human eye.
Light is used to symbolize God, faith or holiness throughout scripture. let your light shine before others, that they may see your good deeds and glorify your father in heaven. Matthew 5: 16
From the beginning of time God has always been the representation of light, he lights up the world and saves us from the darkness within us for without the light we are lost I am the light of the world whoever follows me will never walk in darkness but would have the light of life John 8:12
Scientifically speaking about light we would talk alot about photons and electromagnetic waves
Light is an electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight.
No single answer to the question “What is light?” satisfies the many contexts in which light is experienced, explored, and exploited. The physicist is interested in the physical properties of light, the artist in an aesthetic appreciation of the visual world. Through the sense of sight, light is a primary tool for perceiving the world and communicating within it. Light from the Sun warms the Earth, drives global weather patterns, and initiates the life-sustaining process of photosynthesis. On the grandest scale, light’s interactions with matter have helped shape the structure of the universe. Indeed, light provides a window on the universe, from cosmological to atomic scales.