Definition of "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 or extent or degree
"Made the most money he could."
adjective: (superlative of many' used with count nouns and often preceded by the') quantifier meaning the greatest in number
"Who has the most apples?."
adverb: (of actions or states) slightly short of or not quite accomplished; all but
"The baby was almost asleep when the alarm sounded."
adverb: used to form the superlative
"The king cobra is the most dangerous snake."
"A most welcome relief."