imaginary

adjective

imag·​i·​nary i-ˈma-jə-ˌner-ē 

-ˌne-rē

1

a

: existing only in imagination : lacking factual reality

b

: formed or characterized imaginatively or arbitrarily

his canvases, chiefly imaginary, somber landscapes

—Current Biography

2

: containing or relating to the imaginary unit

imaginary roots

imaginarily

i-ˌma-jə-ˈner-ə-lē 

adverb

imaginariness

i-ˈma-jə-ˌner-ē-nəs 

noun

Synonyms

• chimerical
• chimeric
• fabulous
• fanciful
• fantasied
• fantastic
• fantastical
• fictional
• fictitious
• ideal
• imaginal
• imagined
• invented
• made-up
• make-believe
• mythical
• mythic
• notional
• phantasmal
• phantasmic
• phantom
• pretend
• unreal
• visionary

Choose the Right Synonym for imaginary

imaginary, fanciful, visionary, fantastic, chimerical, quixotic mean unreal or unbelievable.

imaginary applies to something which is fictitious and purely the product of one's imagination.

an imaginary desert isle

fanciful suggests the free play of the imagination.

a teller of fanciful stories

visionary stresses impracticality or incapability of realization.

visionary schemes

fantastic implies incredibility or strangeness beyond belief.

a fantastic world inhabited by monsters

chimerical combines the implication of visionary and fantastic.

chimerical dreams of future progress

quixotic implies a devotion to romantic or chivalrous ideals unrestrained by ordinary prudence and common sense.

a quixotic crusade

Examples of imaginary in a Sentence

The two groups were separated by an imaginary line down the middle of the room.

an imaginary world of dragons and unicorns

Recent Examples on the Web

That’s when Cora fired up some kind of imaginary jukebox inside his head and proceeded to dance the day away. —Steve Buckley, The Athletic, 16 Feb. 2025

Gradually, an imaginary narrative for the property took shape. —Blaine Davis, New York Times, 11 Feb. 2025

Now on its final chapter, Cartier’s Nature Sauvage high jewelry collection pushed further the figurative fantasies that stage animals in imaginary locales and situations. —Lily Templeton, WWD, 10 Feb. 2025

Location: Global Show Your Brain Some Love Reading Emotions Credit: Canva Why do imaginary stories feel so real? —Caroline Nickerson, Discover Magazine, 10 Feb. 2025

Word History

Etymology

Middle English ymaginarie, borrowed from Latin imāginārius "unreal, fictitious (in law)," from imāgin-, imāgō "representation, semblance, image entry 1" + -ārius -ary entry 2

First Known Use

15th century, in the meaning defined at sense 1a

Phrases Containing imaginary

• imaginary number
• imaginary part
• imaginary unit
• pure imaginary

Kids Definition

imaginary

adjective

imag·​i·​nary im-ˈaj-ə-ˌner-ē 

: existing only in imagination : not real

unicorns are imaginary

Medical Definition

imaginary

adjective

imag·​i·​nary im-ˈaj-ə-ˌner-ē 

: existing only in imagination : lacking factual reality

imaginary fears

an imaginary illness