Infinity is the state or quality of being infinite, unending or endless. The infinity symbol is a visual representation of this meaning. Usually the infinity symbol is seen in mathematics, and it may represent an uncountable number.
The infinity symbol was first used in the 17th century for the mathematical concept of conics. However, the symbol became popular and began to symbolize infinity in contexts outside of mathematics. As of 2014, the infinity symbol is seen most frequently in math textbooks and tattoo parlors. The infinity symbol is one design that is a popular choice among those seeking tattoos, whether or not they are interested in mathematics.