Definitions
1.VerbTo close (a building) so that no one can enter.
2.VerbTo terminate (a business).
3.VerbTo put (someone or something) in a secure enclosed space, such as a room or container."The wicked prince was shut up in the castle dungeon.; The engineer had shut the locomotive up in the shed for twenty years."
4.VerbOf a person, to stop talking (said by someone, often one in authority, after one has said something annoying, irrelevant, or false, during a period of peace and quiet, or when one is not allowed to talk) or arguing, or (of a person or thing) making noise."You are talking so loud that I can't hear the music – would you mind shutting up?; He was blathering on about something, but I managed to shut him up.; She told us earlier that none of what you just said was true, so shut up!"
5.VerbTo murder, kill."I just heard that your wife was trying to shut you up for the insurance money."
6.AdjectiveClosed up or off, as in a building that no one is to enter.
7.InterjectionStop talking (usually in the form of making annoying, irrelevant, or false comments, during a period of peace and quiet, or when one is not allowed to talk), arguing, crying, etc."Shut up! We're sick of your whining!"
8.InterjectionI don't believe it!, no way!"I got accepted to Yale! —Shut up, really? That's awesome!"