These are the meanings of the letters MDRU when you unscramble them.
            
                
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                    Drum (n.)
                    
                        A cylinder on a revolving shaft, generally for the purpose of   driving several pulleys, by means of belts or straps passing around its   periphery; also, the barrel of a hoisting machine, on which the rope or   chain is wound.
                     
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                    Drum (n.)
                    
                        A noisy, tumultuous assembly of fashionable people at a   private house; a rout.
                     
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                    Drum (n.)
                    
                        A sheet iron radiator, often in the shape of a drum, for   warming an apartment by means of heat received from a stovepipe, or a   cylindrical receiver for steam, etc.
                     
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                    Drum (n.)
                    
                        A small cylindrical box in which figs, etc., are packed.
                     
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                    Drum (n.)
                    
                        A tea party; a kettledrum.
                     
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                    Drum (n.)
                    
                        An instrument of percussion, consisting either of a hollow   cylinder, over each end of which is stretched a piece of skin or   vellum, to be beaten with a stick; or of a metallic hemisphere   (kettledrum) with a single piece of skin to be so beaten; the common   instrument for marking time in martial music; one of the pair of   tympani in an orchestra, or cavalry band.
                     
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                    Drum (n.)
                    
                        Anything resembling a drum in form
                     
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                    Drum (n.)
                    
                        One of the cylindrical, or nearly cylindrical, blocks, of   which the shaft of a column is composed; also, a vertical wall, whether   circular or polygonal in plan, carrying a cupola or dome.
                     
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                    Drum (n.)
                    
                        See Drumfish.
                     
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                    Drum (n.)
                    
                        The tympanum of the ear; -- often, but incorrectly, applied   to the tympanic membrane.
                     
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                    Drum (v. i.)
                    
                        To beat a drum with sticks; to beat or play a tune on a   drum.
                     
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                    Drum (v. i.)
                    
                        To beat with the fingers, as with drumsticks; to beat with   a rapid succession of strokes; to make a noise like that of a beaten   drum; as, the ruffed grouse drums with his wings.
                     
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                    Drum (v. i.)
                    
                        To go about, as a drummer does, to gather recruits, to   draw or secure partisans, customers, etc,; -- with for.
                     
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                    Drum (v. i.)
                    
                        To throb, as the heart.
                     
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                    Drum (v. t.)
                    
                        (With out) To expel ignominiously, with beat of drum; as,   to drum out a deserter or rogue from a camp, etc.
                     
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                    Drum (v. t.)
                    
                        (With up) To assemble by, or as by, beat of drum; to   collect; to gather or draw by solicitation; as, to drum up recruits; to   drum up customers.
                     
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                    Drum (v. t.)
                    
                        To execute on a drum, as a tune.