empty chair

Noun

 * 1)  A chair which is used to personify the client's object of conflict
 * 2) A podium or chair left empty to highlight the absence of someone from a debate.
 * 3) A position held by someone who is absent or otherwise ineffectual.
 * 1) A position held by someone who is absent or otherwise ineffectual.

Verb

 * 1)  To draw attention to (a person who is absent from a debate) by providing an empty podium or chair which they would have occupied.