de ‧ cep ‧ tion /dɪˈsepʃ ə n/ BrE AmE noun [uncountable and countable]
[ Word Family: noun : ↑ deceit , ↑ deceiver , ↑ deception ; adjective : ↑ deceitful , ↑ deceptive ; verb : ↑ deceive ; adverb : ↑ deceptively ]
[ Date: 1400-1500 ; Language: French ; Origin: Late Latin deceptio , from Latin decipere ; ⇨ ↑ deceive ]
the act of deliberately making someone believe something that is not true ⇨ deceive :
She didn’t have the courage to admit to her deception.
He was convicted of obtaining money by deception.