Most; largest.
Most superior; most favorable.
The person (or persons; or thing or things) that is (are) most excellent.
The supreme effort one can make, or has made.
One's best behavior.
Had best.
To surpass in skill or achievement.
To beat in a contest.
To the most advantage; with the most success, cause, profit, benefit, or propriety.
Used as a polite closing of a letter