Consult Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments). Enter your search and choose your title from the drop-down menu.
must1 auxiliary verb 1 used to express necessity I must earn some extra money Must you leave so soon? 2 used to express duty or obligation You must help him. 3 used to express certainty You must be Charles. 4 used to express determination I must remember to go to the bank. 5 used to express probability She must be there by now. 6 used to express inevitability We must all die some time. 7 used to express an invitation or suggestion You must come and see us soon You must read her other books. Also used with the main verb merely implied I must away. See also mustn't. noun (always a must) a necessity; something essential Fitness is a must in professional sport. must needs see needs must at need.
ETYMOLOGY: Anglo-Saxon moste, originally as past tense of mot may1.
must2 noun the juice of grapes or other fruit before it is completely fermented to become wine.
ETYMOLOGY: Anglo-Saxon: from Latin mustum vinum new wine.
must3 noun mustiness; mould.
musth or must noun (especially in to be in musth) a dangerous frenzied state in certain male animals, especially bull elephants in the breeding season.
ETYMOLOGY: 19c: from Persian and Hindi mast intoxicated.
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