A more thorough explanation:

Definition: AIDER is a noun that has two meanings. Firstly, it refers to an act of helping or assisting someone in need. Secondly, it refers to a person who provides aid or assistance to another person.

Examples:

• After the earthquake, many volunteers came forward to provide aid and support to the victims.
• The doctor's treatment was a great aider in curing the patient's illness.
• She was a great aider to her friend who was going through a tough time.

The first example illustrates the first meaning of AIDER, which is an act of helping or assisting someone in need. The second example illustrates the second meaning of AIDER, which is a person who provides aid or assistance to another person. The third example also illustrates the second meaning of AIDER, where a person is referred to as an aider because they are helping their friend who is going through a tough time.