Insistence on well rather than good has resulted in a split in connotation: well is standard, neutral, and colorless, while good is emotionally charged and emphatic.

GOOD definition: morally excellent; virtuous; righteous; pious. See examples of good used in a sentence.

GOOD definition: 1. very satisfactory, enjoyable, pleasant, or interesting: 2. used when saying goodbye to someone…. Learn more.

Being positive or desirable in nature; not bad or poor: a good experience; good news from the hospital. 2. a. Having the qualities that are desirable or distinguishing in a particular thing: a good exterior …

Definition of good adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

There are 121 meanings listed in OED's entry for the word good, 16 of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

good or well? Good is an adjective. Well is the adverb form of good. Compare: He is a good baseball player. He hits the ball well.