Learn how to say Imaginary correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word imaginary:
1existing only in the imagination:
Chris had imaginary conversations with her
2 Mathematics (of a number or quantity) expressed in terms of the square root of a negative number (usually the square root of −1, represented by i or j). See also complex.
late Middle English: from Latin imaginarius, from imago, imagin- ‘image’