most (Noun) — The property resulting from being or relating to the greater in number of two parts; the main part.
most (Adjective) — (superlative of 'many' used with count nouns and often preceded by 'the') quantifier meaning the greatest in number. ex. "who has the most apples?" ex. "most people like eggs" ex. "most fishes have fins"
most (Adjective) — The superlative of 'much' that can be used with mass nouns and is usually preceded by 'the'; a quantifier meaning the greatest in amount, extent or degree. ex. "made the most money he could" ex. "what attracts the most attention?" ex. "made the most of a bad deal"
most (Adverb) — Used to form the superlative. ex. "the king cobra is the most dangerous snake"
most (Adverb) — Very. ex. "a most welcome relief"
most (Adverb) — (of actions or states) slightly short of or not quite accomplished; all but. ex. "most everyone agrees"