noun in·fin·i·ty \in-ˈfi-nə-tē\

: the quality of having no limits or end : the quality of being infinite

: a space, amount, or period of time that has no limits or end

: a very great number or amount

plural in·fin·i·ties

Full Definition of INFINITY

a :  the quality of being infinite
b :  unlimited extent of time, space, or quantity :  boundlessness
:  an indefinitely great number or amount <an infinity of stars>
a :  the limit of the value of a function or variable when it tends to become numerically larger than any preassigned finite number
b :  a part of a geometric magnitude that lies beyond any part whose distance from a given reference position is finite <do parallel lines ever meet if they extend to infinity>
c :  a transfinite number (as aleph-null)
:  a distance so great that the rays of light from a point source at that distance may be regarded as parallel

Examples of INFINITY

  1. The view tapers off into infinity.
  2. a series of numbers that continues to infinity
  3. The night sky was filled with an infinity of stars.

First Known Use of INFINITY

14th century

Other Mathematics and Statistics Terms

abscissa, denominator, divisor, equilateral, exponent, hypotenuse, logarithm, oblique, radii, rhomb
INFINITIES Defined for Kids


noun in·fin·i·ty \in-ˈfi-nə-tē\
plural in·fin·i·ties

Definition of INFINITY for Kids

:  the quality of being without limits <the infinity of space>
:  a space, quantity, or period of time that is without limit


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