A more thorough explanation:

Definition: To allege means to claim or assert something as true; to make an allegation.

Example 1: The witness alleged that she saw the suspect at the scene of the crime.

Example 2: The newspaper article alleged that the politician had accepted bribes.

These examples illustrate how to allege means to make a claim or accusation. In the first example, the witness is claiming that she saw the suspect at the scene of the crime. In the second example, the newspaper article is accusing the politician of accepting bribes. Both examples show how to allege is used to assert something as true, even if it has not been proven yet.