Let's Compare Eternity and Infinity

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Eternity refers to the measure of time; as time being unlimited. Infinity refers to anything without limit.


Eternity (or forever) is endless time. It is often referenced in the context of religion, in the concept of immortality, whereby death is conquered, and people may live for an unlimited amount of time (cf.

eternity n 1: time without end [syn: {infinity}] 2: a state of eternal existence believed in some religions to characterize the afterlife [syn: {timelessness}, {timeless existence}] 3: a seemingly endless time interval (waiting)

112 Moby Thesaurus words for "eternity": Beulah, Beulah Land, Heaven, Land of Beulah, Paradise, a better place, aeon, afterlife, age, ages, all-comprehensiveness, all-inclusiveness, an eternity, better world, blue moon, boundlessness, ceaselessness, century, coeternity, constancy, continualness, continuance, countlessness, datelessness, durability, endless time, endlessness, eternal home, eternalness, ever-duringness, everlasting moment, everlastingness, everness, exhaustlessness, forever, foreverness, glory, happy hunting ground, heaven above, heavenly kingdom, high heaven, holiness, illimitability, immeasurability, immensity, immortality, immutability, incalculability, incessancy, incomprehensibility, indestructibility, inexhaustibility, infinite duration, infinite goodness, infinite justice, infinite love, infinite mercy, infinite power, infinite wisdom, infiniteness, infinitude, infinity, innumerability, interminability, kingdom come, kingdom of God, kingdom of glory, kingdom of heaven, light, limitlessness, long, long time, long while, majesty, measurelessness, month of Sundays, never-endingness, neverness, no time, numberlessness, omnipotence, omnipotency, omnipresence, omniscience, omnisciency, otherworld, perdurability, perenniality, perennialness, permanence, perpetualness, perpetuity, presence of God, realm of light, right smart spell, sempiternity, sovereignty, stability, termlessness, the Promised Land, the happy land, the world above, time without end, timelessness, ubiquity, unceasingness, unity, universality, unmeasurability, world without end, years, years on end

Eternity \E*ter"ni*ty\, n.; pl. {Eternities}. [F. ['e]ternit['e], L. aeternitas, fr. aeternus. See {Etern}.] 1. Infinite duration, without beginning in the past or end in the future; also, duration without end in the future; endless time. [1913 Webster] The high and lofty One, that inhabiteth eternity. --Is. lvii. 15. [1913 Webster] 2. Condition which begins at death; immortality. [1913 Webster] Thou know'st 't is common; all that lives must die, Passing through nature to eternity. --Shak. [1913 Webster]


Infinity (symbol: ∞) refers to something without any limit, and is a concept relevant in a number of fields, predominantly mathematics and physics.

infinity n : time without end [syn: {eternity}]

153 Moby Thesaurus words for "infinity": Gaussian integer, aesthetic distance, algebraic number, ampleness, amplitude, astronomical number, billion, boundlessness, bulk, cardinal, cardinal number, ceaselessness, clearance, coeternity, compass, complex number, constancy, continualness, continuance, deep space, defective number, depths of space, distance, divergence, durability, endlessness, enormity, enormousness, eternalness, eternity, even number, ever-duringness, everlastingness, everness, everywhereness, expanse, extension, extent, farness, finite number, foreverness, formidableness, fraction, fullness, gigantism, glory, googol, googolplex, grandeur, grandness, great scope, greatness, holiness, hugeness, imaginary number, immensity, immutability, impair, incessancy, indestructibility, infinite duration, infinite goodness, infinite justice, infinite love, infinite mercy, infinite power, infinite wisdom, infinitude, integer, intensity, interminability, irrational, irrational number, jillion, large number, largeness, leeway, length, lengthiness, light, light-years, linear measures, long time, longitude, longness, magnitude, majesty, margin, measure, might, mightiness, mileage, mixed number, muchness, never-endingness, omnipotence, omnipotency, omnipresence, omniscience, omnisciency, ordinal, overall length, pair, parsecs, perdurability, perenniality, perennialness, permanence, perpetualness, perpetuity, perspective, piece, plenitude, polygonal number, power, prime number, prodigiousness, pure imaginary, range, rational, rational number, reach, real, real number, rectangular number, remoteness, round number, sempiternity, separation, serial number, sovereignty, space, span, stability, strength, stretch, stride, stupendousness, surd, timelessness, transcendental number, transfinite number, tremendousness, trillion, ubiquity, unceasingness, unity, vastness, way, ways, whole number, yardage, zillion

infinity n. 1. The largest value that can be represented in a particular type of variable (register, memory location, data type, whatever). 2. `minus infinity': The smallest such value, not necessarily or even usually the simple negation of plus infinity. In N-bit twos-complement arithmetic, infinity is 2^(N-1) - 1 but minus infinity is - (2^(N-1)), not -(2^(N-1) - 1). Note also that this is different from "time T equals minus infinity", which is closer to a mathematician's usage of infinity.

Infinity \In*fin"i*ty\, n.; pl. {Infinities}. [L. infinitas; pref. in- not + finis boundary, limit, end: cf. F. infinit['e]. See {Finite}.] [1913 Webster] 1. Unlimited extent of time, space, or quantity; eternity; boundlessness; immensity. --Sir T. More. [1913 Webster] There can not be more infinities than one; for one of them would limit the other. --Sir W. Raleigh. [1913 Webster] 2. Unlimited capacity, energy, excellence, or knowledge; as, the infinity of God and his perfections. --Hooker. [1913 Webster] 3. Endless or indefinite number; great multitude; as an infinity of beauties. --Broome. [1913 Webster] 4. (Math.) A quantity greater than any assignable quantity of the same kind. [1913 Webster] Note: Mathematically considered, infinity is always a limit of a variable quantity, resulting from a particular supposition made upon the varying element which enters it. --Davies & Peck (Math. Dict.). [1913 Webster] 5. (Geom.) That part of a line, or of a plane, or of space, which is infinitely distant. In modern geometry, parallel lines or planes are sometimes treated as lines or planes meeting at infinity. [1913 Webster] {Circle at infinity}, an imaginary circle at infinity, through which, in geometry of three dimensions, every sphere is imagined to pass. {Circular points at infinity}. See under {Circular}. [1913 Webster]

infinity 1. The size of something {infinite}. Using the word in the context of sets is sloppy, since different {infinite set}s aren't necessarily the same size {cardinality} as each other. See also {aleph 0} 2. The largest value that can be represented in a particular type of variable ({register}, memory location, data type, whatever). See also {minus infinity}. [{Jargon File}] (1994-11-18)

Data Sources:

  • eternity: WordNet (r) 2.0
  • eternity: Moby Thesaurus II by Grady Ward, 1.0
  • eternity: The Collaborative International Dictionary of English v.0.44
  • infinity: WordNet (r) 2.0
  • infinity: Moby Thesaurus II by Grady Ward, 1.0
  • infinity: Jargon File (4.3.1, 29 Jun 2001)
  • infinity: The Collaborative International Dictionary of English v.0.44
  • infinity: The Free On-line Dictionary of Computing (27 SEP 03)

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