(a)better(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”
(s)better, best(comparative and superlative of `well') wiser or more advantageous and hence advisable“it would be better to speak to him”, “the White House thought it best not to respond”
(r)bettercomparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc.“She had never sung better”, “a deed better left undone”, “better suited to the job”