To send; to dispatch.
Have you sent off your application yet?
To emit; to emanate.
To show someone a red card, and dismiss them from the playing area.
To provide a celebration for someone who is leaving; give a sendoff.
A penalty for a serious infraction of the rules in which the player is ordered to leave for the rest of the game; red card
A party for a person (i.e. a fellow employee) who is leaving; a farewell party.
We had a sendoff for our departing colleague as he left for a new job.
A party to recognize the passing (death) of a friend and allow survivors to reminisce about the person's life.