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Infinity vs Forever - What's the difference?

infinity | forever |

As nouns the difference between infinity and forever

is that infinity is endlessness, unlimitedness, absence of end or limit while forever is an extremely long time.

As an adverb forever is

for all time, for all eternity; for an infinite amount of time.

infinity

English

Noun

  • (label) Endlessness, unlimitedness, absence of end or limit.
  • A number that has an infinite numerical value that cannot be counted.
  • * {{quote-magazine, date=2012-01
    • , author=Michael Riordan , title=Tackling Infinity , volume=100, issue=1, page=86 , magazine= citation , passage=Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity, have been dogged for decades by infinities' that erupt when theorists try to prod their calculations into new domains. Getting rid of these nagging ' infinities has probably occupied far more effort than was spent in originating the theories.}}
  • An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.
  • (label) 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.
  • (label) The symbol .

    • Usage notes

    In mathematics there are several different infinities; see transfinite.

    Related terms

    * finish * finite * infinite * infinitesimal * infinitieth

    Antonyms

    * finity

    See also

    * eternal * eternity * transfinite

    forever

    English

    Alternative forms

    * for ever

    Adverb

    (-)
  • (duration) for all time, for all eternity; for an infinite amount of time.
    • ''I shall love you forever .
  • * 1839 , Denison Olmsted, A Compendium of Astronomy Page 95
    • Secondly, When a body is once in motion it will continue to move forever , unless something stops it. When a ball is struck on the surface of the earth, the friction of the earth and the resistance of the air soon stop its motion.
  • (duration, colloquial) for a very long time, 'an' eternity.
    • ''We had to wait forever to get inside.
  • (frequency) constantly or frequently.
    • ''You are forever nagging me.
  • * 1912 : (Edgar Rice Burroughs), (Tarzan of the Apes), Chapter 5
    • Early in his boyhood he had learned to form ropes by twisting and tying long grasses together, and with these he was forever tripping Tublat or attempting to hang him from some overhanging branch.

    Usage notes

    * In the United Kingdom and most of the Commonwealth, the spelling for ever'' may be used instead of ''forever'' for the senses "for all time" and "for a long time". In Canada and the United States, generally only ''forever is used, regardless of sense.

    Synonyms

    * always * continually * eternally * evermore * for good * forevermore * for ever more * incessantly * until Kingdom come

    Derived terms

    * foreverness

    Related terms

    * everlasting * every * everyday * never * nevermore * whatever * whenever * whoever

    Noun

    (en noun)
  • An extremely long time.
  • *
  • * 2007 , Ruth O'Callaghan, Where acid has etched
    • In the airport, holiday lovers kiss, mouth forevers , the usual argot betrays you. Desire makes love dull.
  • (colloquial) a mythical time in the infinite future that will never come.
    • ''Sure, I'd be happy to meet with you on the 12th of forever .