imagrainary什么意思？

应该是

imaginary [i'mædʒinəri]

a. 想象中的,假想的,虚构的,幻想的;虚数的
词形变化
复 数：i·mag·i·nar·ies
名 词：i·mag'i·nar'i·ness
副 词：i·mag'i·nar'i·ly
……
常用短语
imaginary number
虚数

imaginary part
虚部，虚数部分

……
英英解释
1个名词解释
(mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1
[同] complex number, complex quantity, imaginary, imaginary number

1个形容词解释
not based on fact; dubious
[同] fanciful, imaginary, imagined, notional
[例]

the falsehood about some fanciful secret treaties
a small child's imaginary friends
her imagined fame
to create a notional world for oneself
……
参考例句
The equator is an imaginary line.
赤道是一条实际上并不存在的线。

Her memoirs are people with imaginary creatures.
她的回忆录中有许多虚构的人物。

Imaginary; unreal; fanciful.