DictionaryAI

imaginary

i-MAJ-i-nair-ee/ɪˈmæd͡ʒɪˌn(ɛ)ɹi/UKi-MAJ-i-nuh-ree/ɪˈmæd͡ʒɪnəɹi/

Noun pluralimaginaries

5 meanings of imaginary

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  1. 1
    adjective
    Existing only in the mind, not in real life.

    Like a dragon you dream up in your head: it feels real, but it isn't there.

    Her little brother has an imaginary friend named Pip.

    The game took place in an imaginary world with talking animals.

    Similarfictional, fictitious, invented, made-up, pretend

    Oppositereal, actual

    Note
  2. 2
    adjective
    In math, describing a number that is a multiple of the square root of minus one.

    In class we learned about imaginary numbers like 2i and 5i.

    An imaginary value times itself gives a negative answer.

    Oppositereal

    Note
  3. 3
    nouncountable
    A number that is a multiple of the square root of minus one, with no real part.

    On the test, we had to add two imaginaries together.

    The calculator can handle an imaginary just as easily as a whole number.

    Note
  4. 4
    nouncountable
    The shared ideas, rules, and symbols a group uses to picture itself as one whole society.

    Like the shared story a team tells about who they are and what they stand for.

    Every nation has an imaginary that holds its people together.

    Festivals and flags are part of a country's imaginary.

    Note
  5. 5
    noununcountable
    The ability to make pictures and ideas in your mind.

    Like a paint set inside your head for making new ideas.

    Her imaginary filled the empty house with stories and voices.

    A child's imaginary turns a cardboard box into a spaceship.

    Similarimagination, fancy

    Note

Practice

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Origin

From Latin imaginarius "relating to images," from imago "image." The math meaning comes from René Descartes, who used French imaginaire in 1637 to mock the idea of non-real roots as numbers.