You say ' Good ' or ' Very good ' to express pleasure, satisfaction, or agreement with something that has been said or done, especially when you are in a position of authority. 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 paint; a good joke. b. Serving the desired purpose or end; suitable: Is this a good dress for the party? 3. a. Synonyms for GOOD : pleasant, delightful, enjoyable, pleasing, nice, sweet, satisfying, welcome; Antonyms of GOOD : unpleasant, disagreeable, miserable, horrid, unwelcome, unpalatable, abominable, ghastly In most contexts, the concept of good denotes the conduct that should be preferred when posed with a choice between possible actions. Good is generally considered to be the opposite of evil.