A lie (also called prevarication, falsehood) is a type of deception in the form of an untruthful statement, especially with the intention to deceive others.
To lie is to state something with disregard to the truth with the intention that people will accept the statement as truth.
A liar is a person who is lying, who has previously lied, or who tends by nature to lie repeatedly - even when not necessary.
The four reasons people lie:
As a joke
To escape punishment
Different types of lies:
Little white lie
Big black lie
Compliments and false reassurances
Signs to look out for to tell if someone is lying: