adjective
Definition: Describing an action that is ongoing or not finished, often used in grammar to indicate that an action is not completed or is repeated.
Example: In some languages, the imperfective aspect is used to show that an action is still happening.
noun
Definition: A type of verb that describes an action that is ongoing, repeated, or not completed.
Example: In the sentence 'She was reading a book', 'reading' is in the imperfective aspect.