Read the dictionary definition of better. All definitions for this word.
1. something superior in quality or condition or effect
1. a change for the better
2. the superior one of two alternatives
1. chose the better of the two
3. a superior person having claim to precedence
1. the common man has been kept in his place by his betters
4. someone who bets
5. get better
1. The weather improved toward evening
6. to make better
1. The editor improved the manuscript with his changes
7. surpass in excellence
1. She bettered her own record
2. break a record
8. (comparative and superlative of `well') wiser or more advantageous and hence advisable
1. it would be better to speak to him
2. the White House thought it best not to respond
9. (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
1. You're a better man than I am, Gunga Din
2. a better coat
3. a better type of car
4. a suit with a better fit
5. a better chance of success
6. produced a better mousetrap
7. she's better in math than in history
10. (comparative of `good') changed for the better in health or fitness
1. her health is better now
2. I feel better
11. more than half
1. argued for the better part of an hour
12. comparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc.
1. She had never sung better
2. a deed better left undone
3. better suited to the job
13. from a position of superiority or authority
1. father knows best
2. I know better.
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Merriam-Webster definition of better