most adverb
1 : in or to the greatest degree
▪ Of all the gifts he received that day, the book pleased him most. ▪ What matters most to you? ▪ The island is the most southern in the chain. ▪ You'll benefit most from the exercises if you do them every day. ▪ most active/important ▪ most actively/importantly ▪ It's the most challenging job she has ever had. ▪ the most beautiful woman there ▪ Even the most careful of us make mistakes. ▪ the most common/popular kind ▪ The report shows the intersections at which accidents are most likely to occur. ▪ the most widely used treatment 2 somewhat formal : to a great extent : very
▪ He is a most careful driver. ▪ Their argument was most persuasive.
most adverb
US, informal : very nearly : almost — usually used with the adjectives all, every, and any; the pronouns all, everyone, everything, everybody, anyone, anything, and anybody; and the adverbs everywhere, anywhere, and always ▪ The cost of most everything is higher. ▪ Most anyone can go. ▪ most everywhere in the country ▪ We'll be arriving most any time now. ▪ They most always skip lunch.