Describes a plan, method, trick, or design that is cleverly thought out and skillfully executed, often with a nuance of being artful or cunning.
The criminal deceived the police with an ingenious method.
I was thoroughly impressed by his clever way of speaking.
The criminal used a cunning method to steal money from the bank.
He set an elaborate trap to lure out the enemy.
This safe has an ingenious mechanism built into it.
That advertisement cleverly exploits consumer psychology.