A more thorough explanation:

deal, n.

1. An act of buying and selling; the purchase and exchange of something for profit. For example, "He made a great deal of money by selling his company."
2. An arrangement for mutual advantage. For example, "The witness accepted the prosecutor's deal to testify in exchange for immunity."
3. An indefinite quantity. For example, "She spent a great deal of time studying for her exams."

deal, vb.

1. To distribute something. For example, "He was caught dealing drugs on the street corner."
2. To transact business with a person or entity. For example, "I always deal with the same car dealership when buying a new car."
3. To conspire with a person or entity. For example, "The two companies were caught dealing for the account."

These examples illustrate the different ways the word "deal" can be used. The first example under "deal, n." shows how it can refer to a financial transaction. The second example shows how it can refer to an agreement between two parties. The third example shows how it can refer to an unspecified amount of something.

Under "deal, vb.," the first example shows how it can refer to the illegal distribution of drugs. The second example shows how it can refer to conducting business with a specific person or entity. The third example shows how it can refer to conspiring with someone or something for a specific purpose.