Definitions for "Lay Witness"
a witness that is testifying as a witness to a fact or an opinion as opposed to an opinion given by an expert about a matter beyond the expected comprehension of the jury
An eyewitness, character witness, or any other person called upon to testify who is not considered an expert. Lay witnesses must testify to facts alone and may not draw conclusions or express opinions.
any witness who does not testify as an expert witness