The Collaborative International Dictionary
meals on wheels \meals on wheels\, meals-on-wheels \meals-on-wheels\n. A program that delivers hot meals to persons, such as the elderly or disabled, who are confined to their homes and unable to cook for themselves; also, the meals thus delivered. Such programs are usually conducted by governmental or charitable organizations.
Wiktionary
n. (context idiomatic English) A service that delivers food to those unable to cook for themselves such as the elderly and people with disabilities.
Wikipedia
Meals on Wheels are programmes that deliver meals to individuals at home who are unable to purchase or prepare their own meals. The name is often used generically to refer to home-delivered meals programs, not all of which are actually named "Meals on Wheels". Because they are housebound, many of the recipients are the elderly, and many of the volunteers are also elderly but able-bodied and able to drive wheeled vehicles, usually a van.
Usage examples of "meals on wheels".
Schools were closed, factories were closed, Meals on Wheels was not running.
Whatever her talents in bed, which Corde guessed were pretty damn plentiful if both Sayles and Okun had risked their jobs to have her, Jennie was still nothing more than an average student, a suburban girl, fat at the throat, the daughter of a small-business man, a Meals on Wheels volunteer, a very ordinary young woman.
I found a cab company that delivers fast food, sort of like Meals on Wheels.
He worked as an administrator for the local Meals on Wheels program.
Marla lives on the meals that Meals on Wheels delivers for her neighbors who are dead.
Long story short, this afternoon Marla was just lying in bed, waiting for the Meals on Wheels delivery between noon and two.