• Endlessness, unlimitedness, absence of a beginning, end or limits to size.
  • A number that has an infinite numerical value that cannot be counted.
  • An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.
  • A number which is very large compared to some characteristic number. For example, in optics, an object which is much further away than the focal length of a lens is said to be "at infinity", as the distance of the image from the lens varies very little as the distance increases further.
  • The symbol ∞.


Opposite words


  • From Middle English infinite, from Old French infinité, from Latin infinitas ("unlimitedness"), from negative prefix in-, + finis, + noun of state suffix -tas.

Modern English dictionary

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