Perjury is a wilful and knowing telling of  an untruth or a lie about a material fact under oath.  A material fact is a fact which could convince the jury to find in a civil case liability, for instance, rather than no liability, or in a criminal case reach a verdict of guilty rather than one of not guilty.

Not stopping for a red light could be a material fact in either a civil or criminal case.

Being a bottle blonde is unlikely to be a material fact in any case, civil or criminal.

If someone filed false reports with the police, that would be considered false swearing, usually a lesser offense than perjury.

If someone simply lied to someone else, that's not a crime . . . but it may be actionable in tort, for instance, defamation (very difficult to win), slander (speech), or libel (writing).