Oral or verbal evidence rather than written. The parol evidence rule limits the admissibility of parol evidence which would directly contradict the clear meaning of terms of a written contract.

Evidence given by mouth. Often not allowed in court when used to dispute written agreements.

Evidence by word of mouth or by documents not under seal. It is a general rule that such evidence is inadmissible to override a written contract, such as an insurance policy, unless fraud or mistake is alleged.