1.Definition: (comparative and superlative of `well') wiser or more advantageous and hence advisable
"It would be better to speak to him"
2.Definition: (comparative of `good') changed for the better in health or fitness
"Her health is better now", "I feel better"
3.Definition: (comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another
"You're a better man than I am, Gunga Din", "A better coat", "A better type of car", "A suit with a better fit", "A better chance of success", "Produced a better mousetrap", "She's better in math than in history"
4.Definition: more than half
"Argued for the better part of an hour"