Definitions
Not based on reason or clear logic.
Word origin
From Latin irratiōnālis, from ir- + ratiōnālis.
Used in a sentence
“an irrational decision”
“The number π is irrational.”
“The square root of 2, which was the first irrational to be discovered, was known to the early Pythagoreans, and ingenious methods of approximating to its value were discovered.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Not logical”10 letters
Not quite right?
"Search similar patterns."
I_________