Definition of most determiner from the Oxford Advanced American Dictionary

      

    most

     determiner,pronoun
    determiner, pronoun
    NAmE//moʊst//
     
     
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  1. 1(used as the superlative of “much,” “a lot of,” or “many”)
  2. 2 the largest in number or amount Who do you think will get (the) most votes? She had the most money of all of them. I spent the most time on the first question. Who ate the most? The director has the most to lose. The can be left out in informal English.
  3. 3 more than half of someone or something; almost all of someone or something I like most vegetables. Most classical music puts me to sleep. As most of you know, I've decided to resign. Most of the people I had invited turned up. There are thousands of verbs in English and most (of them) are regular. The is not used with most in this meaning.
  4. Idioms
    at (the) most
     
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    not more than As a news item it merits a short paragraph at most. There were 50 people there, at the very most.
See the Oxford Advanced Learner's Dictionary entry: most