To invalidate; to treat as unworthy of serious consideration.
To get a batsman out.
To give someone a red card; to send off.
To reject; to refuse to accept.
To order to leave.
To send or put away, to discard with disregard, contempt or disdain. (sometimes followed by as).
To discharge; to end the employment or service of.
To dispel; to rid one’s mind of.
To dismiss as silly something presented with genuine conviction or treated seriously.