Meaning of IMAGINARY in English

IMAGINARY

■ adjective

1》 existing only in the imagination.

2》 Mathematics (of a number or quantity) expressed in terms of the square root of -1 (represented by i or j ).

Derivatives

imaginarily adverb

Origin

ME: from L. imaginarius , from imago , imagin- 'image'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.