must (n.)

  1. a necessary or essential thing; seat belts are an absolute must'

  2. grape juice before or during fermentation

  3. the quality of smelling or tasting old or stale or mouldy

    [ Syn: mustiness , moldiness ]

    must (adj.)

  1. highly recommended; a book that is must reading'

The dictionary is based on the WordNet Electronic Lexical Database.
WordNet 3.0 Copyright 2011 by Princeton University. All rights reserved.