adjective A word that describes or modifies a noun or pronoun. In this case, 'not bad' is an adjective phrase that describes the quality of something as being satisfactory or decent.
Used to describe a satisfactory experience or solution provided by a customer service representative.
Used to indicate that a dish or meal was better than expected, but not necessarily outstanding.
Used to describe a player's performance as acceptable or decent, but not outstanding.
Used to convey that a film was enjoyable or decent, but not exceptional.
In a professional context, a writer may use 'not bad' to describe a piece of writing that is satisfactory but not exceptional.
A psychologist may use 'not bad' to describe a client's progress or response to treatment as being better than expected but not perfect.
A teacher may use 'not bad' to provide feedback on a student's performance or work, indicating that it meets the minimum standards but has room for improvement.
A chef may use 'not bad' to describe a dish that is decent or satisfactory but not outstanding in terms of taste or presentation.
An engineer may use 'not bad' to describe the performance of a system or component that is acceptable but could be optimized further.