1. To make the necessary arrangements or preparations for something before it happens. The leak in the coolant system could have been catastrophic. Thankfully, we planned for just such an emergency, and we were able to patch it before it did any major damage. We've been planning for a trip across Europe for months now. It just feels like they didn't plan for this wedding very carefully, you know?
2. To make preparations for someone or a group of people. You're more than welcome to join us for dinner, but I hadn't planned for more than four, so there might not be very much food. Jeff said you can plan for him for Christmas dinner.
plan for someone
to prepare enough [of something] for someone. Fred just called and said he can show up for dinner after all. Please plan for him. Tony wasn't planned for, and there is no place for him to sit.
plan for something
1. to prepare for something. I need to take some time and plan for my retirement. We carefully planned for almost every possibility.
2. to prepare or estimate for a certain number [of people or things]. I am planning for twelve. I hope everyone can come.
To prepare for something: Many people don't plan for retirement and then find that they haven't saved enough money.