irrational
1 ENTRIES FOUND:
Britannica Dictionary definition of IRRATIONAL
[more irrational; most irrational]
:
not rational: such as
a
:
not thinking clearly
:
not able to use reason or good judgment
-
He became irrational as the fever got worse.
b
:
not based on reason, good judgment, or clear thinking
-
She had an irrational fear of cats.
-
an irrational prejudice
-
the irrationality of her fear
-
He was behaving irrationally.
