Infinite describes things that are endless, like the universe, or your uncle's corny jokes.

Finite means "relating to something with an end," and when you add the prefix in-, meaning "not," you get infinite: having to do with something that never, ever ends. If someone has read every single book about pyramids, you might say he has an infinite knowledge of ancient Egyptian culture, even though that's an exaggeration. Surely he'll stop talking about them at some point...right?

Definitions of infinite
  1. adjective
    having no limits or boundaries in time or space or extent or magnitude
    “the infinite ingenuity of man”
    infinite wealth”
    boundless, limitless, unbounded
    seemingly boundless in amount, number, degree, or especially extent
    dateless, endless, sempiternal
    having no known beginning and presumably no end
    infinitely great in number
    inexhaustible, unlimited
    that cannot be entirely consumed or used up
    not subject to death
    see moresee less
    bounded or limited in magnitude or spatial or temporal extent
    bounded, delimited
    having the limits or boundaries established
    capable of being used up; capable of being exhausted
    existing or enduring for a limited time only
    not unlimited
    subject to death
    show more antonyms...
  2. adjective
    too numerous to be counted
    “an infinite number of reasons”
    synonyms: countless, innumerable, innumerous, multitudinous, myriad, numberless, uncounted, unnumberable, unnumbered, unnumerable
    not capable of being computed or enumerated
  3. adjective
    total and all-embracing
    “God's infinite wisdom”
    perfect or complete or pure
  4. noun
    the unlimited expanse in which everything is located
    “the boundless regions of the infinite
    synonyms: space
    see moresee less
    show 9 types...
    hide 9 types...
    absolute space
    physical space independent of what occupies it
    phase space
    (physics) an ideal space in which the coordinate dimensions represent the variables that are required to describe a system or substance
    mathematical space, topological space
    (mathematics) any set of points that satisfy a set of postulates of some kind
    outer space, space
    any location outside the Earth's atmosphere
    dynamical system
    (physics) a phase space together with a transformation of that space
    a space that is contained within another space
    null space
    a space that contains no points; and empty space
    a set of points such as those of a closed surface or an analogue in three or more dimensions
    metric space
    a set of points such that for every pair of points there is a nonnegative real number called their distance that is symmetric and satisfies the triangle inequality
    type of:
    an abstraction belonging to or characteristic of an entity
  5. adjective
    of verbs; having neither person nor number nor mood (as a participle or gerund or infinitive)
    infinite verb form”
    synonyms: non-finite
    see moresee less
    of verbs; relating to forms of the verb that are limited in time by a tense and (usually) show agreement with number and person
    having inflections to indicate tense
    show more antonyms...
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week