Greek symbols refer to the various characters, letters, and signs used in the Greek alphabet.
Greek symbols have been widely used in many different fields such as mathematics, physics, engineering, astronomy, and also in literature and art. Some examples of Greek symbols include the letter pi (π) which represents the ratio of a circle's circumference to its diameter in mathematics, the letter sigma (Σ) which is used to denote summation in mathematics, and the letter alpha (α) and beta (β) which are used to denote angles in physics and engineering.
Additionally, Greek symbols have been used as symbols of ideas and concepts such as the letter omega (Ω) which is used to represent the concept of the end or the last, the letter lambda (λ) which is used to represent wavelength in physics and the letter phi (Φ) which is used to represent golden ratio in mathematics.