A more thorough explanation:

Definition: Sum means:

1. A certain amount of money.
2. A summary or collection of information, often used in English law.

For example:

• "I need to withdraw a sum of $100 from the bank."
• "The lawyer presented a sum of evidence to support their case."

The first example shows how sum can refer to a specific amount of money. The second example illustrates how sum can be used to describe a collection or summary of information, in this case, evidence presented in a legal case.