Simple Definition:
* The dictionary defines "serendipity" as the occurrence and development of events by chance in a happy or beneficial way.
* We need to define the project's goals before we can start working on it.
Formal Definition:
* The scientific study defines gravity as the force that attracts objects with mass towards one another.
* The company's mission statement defines its purpose and values.
Figurative Definition:
* Her smile defined her beauty, making her features radiant.
* The experience defined his life, changing his perspective forever.
In a Question:
* Can you define the difference between these two concepts?
* How would you define success in your life?
Note: "Define" can also be used as a command or an imperative statement:
* Define your terms!
* Define the problem clearly before you start solving it.