non ‧ sen ‧ si ‧ cal /nɒnˈsensək ə l, nɒnˈsensɪk ə l $ nɑːn-/ BrE AmE adjective
[ Word Family: adjective : ↑ sensible , ↑ insensible , ↑ senseless , ↑ sensitive ≠ ↑ insensitive , ↑ sensory , ↑ nonsensical , ↑ insensate ; noun : ↑ sense ≠ ↑ nonsense , ↑ sensibility ≠ ↑ insensibility , ↑ sensitivity ≠ ↑ insensitivity , ↑ senselessness , ↑ sensitization , ↑ sensor ; adverb : ↑ sensibly , ↑ senselessly , ↑ sensitively ≠ ↑ insensitively ; verb : ↑ sense , ↑ sensitize ]
ideas, actions, or statements that are nonsensical are not reasonable or sensible:
This is a nonsensical argument.