An interview is a conversation between two people (the interviewer and the interviewee) where question

Question

A question may be either a linguistic expression used to make a request for information, or else the request itself made by such an expression. This information may be provided with an answer....

s are asked by the interviewer to obtain information from the interviewee.
"Definition" -
The qualitative research interview seeks to describe and the meanings of central themes in the life world of the subjects. The main task in interviewing is to understand the meaning of what the interviewees say.