Definitions
1.Adjectivesuperlative form of good: most good."I can either be your best friend or your worst enemy."
2.AdjectiveMost; largest."Unpacking took the best part of a week."
3.AdjectiveMost superior; most favorable."In my opinion, mushrooms are the best pizza toppings."
4.Adverbsuperlative form of well: most well"A popular aphorism says it best: A bird in the hand is worth two in the bush."
5.AdverbTo the most advantage; with the most success, cause, profit, benefit, or propriety."You'd best save a backup copy, just in case the morons lose the one that you sent and then try to act like you never sent one."
6.NounThe supreme effort one can make, or has made."I did my best.; My personal best in that race is eighteen minutes, four seconds."
7.NounOne's best behavior."I was somewhat distant lately, and my lady promised me head every Tuesday of the week when I’m nice to her, so I better be on my best."
8.NounThe person (or persons; or thing or things) that is (are) most excellent."Even the best of us makes mistakes, but only a few with the best of intentions...; We're (the) best of friends, who fortunately enjoy the best of health.; I love it so much! It's the best."
9.VerbTo surpass in skill or achievement.
10.VerbTo beat in a contest.
11.VerbHad best."It's getting late. You best get on home."