Something impractical is difficult or impossible to achieve. It might sound like a great idea, but it's not going to happen. It's just not practical., Impractical definition: not practical or useful.. See examples of IMPRACTICAL used in a sentence., Define impractical. impractical synonyms, impractical pronunciation, impractical translation, English dictionary definition of impractical. adj. 1. Unwise to implement or maintain in practice: Refloating the sunken ship proved impractical because of the great expense. 2. Incapable of dealing, Definition of impractical adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more., Discover everything about the word "IMPRACTICAL" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide., Impractical means not sensible or realistic, often because something is too difficult, expensive, or inefficient to be useful in practice. It describes ideas or actions that are unworkable in real situations..