# Definitions and Synonyms of *imaginary* | Another word for *imaginary* | What is *imaginary? *

*Definition 1: (mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1 - [noun denoting quantity]*

*Synonyms for imaginary in the sense of this definition*

*(**imaginary* is a kind of ...) a concept of quantity involving zero and units

*imaginary*is a kind of ...) a concept of quantity involving zero and units

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*"every number has a unique position in the sequence"*### (... is a kind of *imaginary* ) either of two complex numbers whose real parts are identical and whose imaginary parts differ only in sign

### (... is a kind of *imaginary* ) any rational or irrational number

### (... is a kind of *imaginary* ) an imaginary number of the form a+bi where a is 0

### (*imaginary* is a part of ...) the part of a complex number that has the square root of -1 as a factor

*(imaginary* belongs to category ...) a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement

## Definition 2: not based on fact; existing only in the imagination - [adjective satellite denoting all]

### Samples where imaginary or its synonyms are used according to this definition

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

### Synonyms for imaginary in the sense of this definition

### (*imaginary* is similar to ...) lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria

*"ghosts and other unreal entities"*

*"unreal propaganda serving as news"*