1. to manage someone or something

1. This is not a big problem. I think I can deal with it.

2. I am sure I can deal with Jill.

3. I'll deal with you later.

4. We weren't able/equipped/prepared to deal with such a large crowd of people.

2. to make business agreements with (someone)

1. He deals fairly with all his customers.

2. Their salespeople are very easy to deal with.

3. We’ll continue to deal with the suppliers.

3. to be about (something); to have (something) as a subject; cover, be concerned with

1. Her speech dealt with health care and the nation's economy.

2. Her newspaper articles often dealt with problems at work.

3. The guidelines deal with topics such as diet and exercise.

4. to accept or try to accept (something that is true and cannot be changed); stop making excuses and do something to change a situation

1. The weather is bad, but we'll just have to deal with it.

2. Just deal with it!