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."

adverb: very

"A most welcome relief."