de ‧ lude /dɪˈluːd/ BrE AmE verb [transitive]
[ Date: 1400-1500 ; Language: Latin ; Origin: deludere , from ludere 'to play' ]
to make someone believe something that is not true SYN deceive :
I was angry with him for trying to delude me.
delude somebody/yourself into doing something
It is easy to delude yourself into believing you’re in love.
Don’t be deluded into thinking your house is burglarproof.