Definition of "must" []

• To be obliged or required by morality, law, or custom: Citizens must register in order to vote. (auxiliary-verb)
• To be compelled, as by a physical necessity or requirement: Plants must have oxygen in order to live. (auxiliary-verb)
• Used to express a command or admonition: You must not go there alone. You simply must be careful. (auxiliary-verb)
• To be determined to; have as a fixed resolve: If you must leave, do it quietly. (auxiliary-verb)
• Used to indicate inevitability or certainty: We all must die. (auxiliary-verb)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "August 1, 2009 at 1:36 pm must resist……………..must………….resist."
• "I must say, though, that most everyone around here is looking at me like we *must* be since I quit my job, all our friends are preggers or have babies and it's been two years of marriage..."
• "You thunk it so it must be…….must be…..must be…WHAT?"