Deception, n.
Etymology: [F. déception, L. deceptio, fr. decipere, deceptum. See Deceive.]
1. The act of deceiving or misleading. South.
2. The state of being deceived or misled. There is one thing relating either to the action or enjoyments of man in which he is not liable to deception. South.
3. That which deceives or is intended to deceive; false representation; artifice; cheat; fraud. There was of course room for vast deception. Motley.
Syn. -- Deception, Deceit, Fraud, Imposition. Deception usually refers to the act, and deceit to the habit of the mind; hence we speak of a person as skilled in deception and addicted to deceit. The practice of deceit springs altogether from design, and that of the worst kind; but a deception does not always imply aim and intention. It may be undesigned or accidental. An imposition is an act of deception practiced upon some one to his annoyance or injury; a fraud implies the use of stratagem, with a view to some unlawful gain or advantage.
Shades of meaning
Deceit is the habit, deception the act; guile applies to the disposition out of which deceit and deception grow, and also to their actual practise. A lie, lying, or falsehood, is the uttering of what one knows to be false with intent to deceive. The novel or drama is not a lie, because not meant to deceive; the ancient teaching that the earth was flat was not a lie, because not then known to be false. Untruth is more than lack of accuracy, implying always lack of veracity; but it is a somewhat milder and more dignified word than lie. Falsehood and lying are in utterance; deceit and deception may be merely in act or implication. Deception may be innocent, and even unintentional, as in the case of an optical illusion; deceit always involves injurious intent. Craft and cunning have not necessarily any moral quality; they are common traits of animals, but stand rather low in the human scale. Duplicity is the habitual speaking or acting with intent to appear to mean what one does not. Dissimulation is rather a concealing of what is than a pretense of what is not. Finesse is simply an adroit and delicate management of a matter for one's own side, not necessarily involving deceit. Compare artifice; fiction; fraud; hypocrisy.