To organize, plan, or prepare. Typically followed by "for (someone or something)" or "to (do something)." I will make arrangements for you two to meet this week. We're making arrangements to have the faulty equipment repaired next week. Please make arrangements for my sister. She'll be arriving in the morning.
make arrangements (with someone) (for something)
to make plans with someone for something. I will make arrangements with Fred for the loan. We can make arrangements for a car with the manager.
make arrangements for someone
to plan accommodations for someone. John is coming for a visit next week. Please make arrangements for him at the hotel. I will make arrangements for everyone when I call the hotel.
make arrangements to do something
to plan to do something; to facilitate the doing of something. Please make arrangements to have all this stuff hauled away. We will make arrangements to be there on time.
make arrangements for
Plan or prepare for someone or something, as in Who is making all the arrangements for our sales meeting? This expression employs arrangements in the sense of "measures or preparations for a particular purpose," a usage dating from the late 1700s.