What is another word for imaginary?

Common synonyms for imaginary include complex number, complex quantity, imaginary number.

What is the plural of imaginary?

The plural of imaginary is imaginaries.

/ɪˈmæd͡ʒɪˌn(ɛ)ɹi/noun, adjective5 syllables

Imaginary means: not based on fact; existing only in the imagination.

noun, as in (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1

complex number, complex quantity, imaginary number

adjective, as in not based on fact; existing only in the imagination

fanciful, notional, unreal

also used for imaginary

all in one's head

Includes material from Wiktionary, CC BY-SA 4.0.

adjective

not based on fact; existing only in the imagination“the falsehood about some fanciful secret treaties”

noun

(mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1

Definitions from the Open English WordNet, CC BY 4.0.

Beauty is a fleeting instant, an imaginary perfection – a sweet, dreamlike vision.carlosalberto
Celestial bodies are projected onto an imaginary sphere called the celestial sphere.unknown
Yanni was daydreaming about his imaginary world for hours.Amastan
All the characters in this book are imaginary.CK
All the events described in this story are imaginary.unknown
You didn't really see a ghost—it was only imaginary.shekitten
All her imaginary happiness vanished in a moment.unknown
He started talking to imaginary friends at lunch.Nuel

Sentences from Tatoeba, CC BY 2.0 FR, credited to their authors.

as a noun