noun An act or practice intended to deceive; a trick.
The whole conversation was merely a deceit.
noun An act of deceiving someone.
noun The state of being deceitful or deceptive.
noun The tort or fraudulent representation of a material fact made with knowledge of its falsity, or recklessly, or without reasonable grounds for believing its truth and with intent to induce reliance on it; the plaintiff justifiably relies on the deception, to his injury.