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Audio English.org » Dictionary » I » Illogical ... Imbricate |

Pronunciation (US): |

**Dictionary entry overview: What does imaginary mean?**

• **IMAGINARY** (noun)

The noun **IMAGINARY** has 1 sense:

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

*Familiarity information: IMAGINARY used as a noun is very rare.*

• **IMAGINARY** (adjective)

The adjective **IMAGINARY** has 1 sense:

**1.** not based on fact; dubious

*Familiarity information: IMAGINARY used as an adjective is very rare.*

**Dictionary entry details**

Sense 1 | imaginary ^{[BACK TO TOP]} |

**Meaning:**

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

**Classified under:**

Nouns denoting quantities and units of measure

**Synonyms:**

complex number; complex quantity; imaginary; imaginary number

**Hypernyms ("imaginary" is a kind of...):**

number (a concept of quantity derived from zero and units)

**Meronyms (parts of "imaginary"):**

imaginary part; imaginary part of a complex number (the part of a complex number that has the square root of -1 as a factor)

**Domain category:**

math; mathematics; maths (a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement)

**Hyponyms (each of the following is a kind of "imaginary"):**

complex conjugate (either of two complex numbers whose real parts are identical and whose imaginary parts differ only in sign)

real; real number (any rational or irrational number)

pure imaginary number (an imaginary number of the form a+bi where a is 0)

Sense 1 | imaginary ^{[BACK TO TOP]} |

**Meaning:**

Not based on fact; dubious

**Synonyms:**

imaginary; imagined; notional; fanciful

**Context examples:**

the falsehood about some fanciful secret treaties / a small child's imaginary friends / her imagined fame / to create a notional world for oneself

**Similar:**

unreal (lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria)

Learn English with... Proverbs of the week |

"Mouth is in gear, brain is in neutral" *(English proverb)*

"Out of sight, out of mind."*(Bulgarian proverb)*

"I'm already drowning so why should I fear getting wet?"*(Arabic proverb)*

"Do not hide your light under a bushel"*(Danish proverb)*

"Out of sight, out of mind."

"I'm already drowning so why should I fear getting wet?"

"Do not hide your light under a bushel"

IMAGINARY: related words searches |

» number meaning

» complex conjugate: pronunciation in phonetic transcription

» imaginary part of a complex number definition

» math: pronunciation in phonetic transcription

» unreal meaning

» complex conjugate: pronunciation in phonetic transcription

» imaginary part of a complex number definition

» math: pronunciation in phonetic transcription

» unreal meaning

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