(game theory, of a strategy) That leads to a better outcome no matter what the other player does.

comparative form of well off: more well off

(nonstandard) [had] better not (used in a tag question).

It's better to do something late, than to never do it at all.

(figuratively) A way of presenting or perceiving something such that it appears more favourably than by an alternative presentation or perception.

(modal, auxiliary verb) Contraction of had better.

(intransitive, literally) To improve. / (intransitive, idiomatic) To recover from illness or other incapacitation.

It is often wise to refrain from seemingly brave speech or action.

Alternative spelling of better off

It is preferable to be cautious in one's choices and actions than to act recklessly and suffer afterwards.