In Biology:
* Muscle Insertion: The point where a muscle attaches to the bone that it moves. This is the end of the muscle that moves when the muscle contracts.
* Gene Insertion: The process of adding a new gene into an organism's genome. This can be done using various techniques like CRISPR-Cas9.
* DNA Insertion: The process of adding a new DNA sequence into an existing DNA molecule.
In Computer Science:
* Insertion Sort: A sorting algorithm that works by inserting each element into its correct position in a sorted sub-array.
* Data Insertion: The process of adding new data into a database or data structure.
In General:
* Insertion: The act of placing something into something else. This can be physical, like inserting a key into a lock, or abstract, like inserting a thought into a conversation.
To give you a more specific definition, please provide the context in which you are interested in "insertion."