The meaning of IMAGINARY is existing only in imagination : lacking factual reality. How to use imaginary in a sentence. Synonym Discussion of Imaginary. existing only in imagination : lacking factual reality; formed or characterized imaginatively or arbitrarily… See the full definition. Games; Word of the Day; Grammar ...

IMAGINARY definition: 1. Something that is imaginary is created by and exists only in the mind: 2. Something that is…. Learn more.