Good means having positive qualities or being the right choice for a situation. A good book keeps you interested, a good friend treats you with kindness and loyalty, and a good meal tastes delicious and satisfies your hunger.

What counts as good depends on context. A good umbrella keeps you dry in rain, while a good argument in debate class presents clear reasoning and strong evidence. A good soccer player has skill and works well with teammates. A good decision considers both short-term and long-term consequences.

The word also means morally right or virtuous. Someone who does good helps others without expecting rewards. A person of good character keeps promises, tells the truth, and treats others fairly. When your conscience tells you something is the right thing to do, it's pointing you toward what's good.

Good can mean thorough or complete: a good cleaning leaves no dust behind, and a good night's sleep leaves you refreshed. It can mean considerable in size or amount: a good distance away means quite far, and a good while means a long time.

People sometimes confuse good (an adjective) with well (usually an adverb). You feel good when you're happy, but you do something well when you perform skillfully. Superman does good (helps people), and he does it well (effectively).