Meaning & Definition
adjective
Having no meaning; making no sense.
The idea of a square circle is completely nonsensical.
Characterized by absurdity or illogicality.
His argument was filled with nonsensical claims that defied reason.
Ridiculous or absurd; silly.
Their nonsensical conversation left everyone in the room confused.
Lacking coherent thought or reasoning.
She often writes nonsensical poetry that baffles her teachers.
Etymology
From non- + sensical, relating to sense or meaning.
Common Phrases and Expressions
nonsensical behavior:
Actions that lack any reasonable or logical basis.
nonsensical arguments:
Arguments that do not make sense or are irrational.
nonsensical remarks:
Comments that are foolish or absurd in nature.
Slang Meanings
Gobbledegook
The meeting was filled with gobbledegook that no one could understand.
Balderdash
That theory is pure balderdash.
Catch-22
Trying to explain that situation is a catch-22; it's completely nonsensical.