Real Dictionary

meals on wheels
an agency or service that delivers cooked meals to disabled people and senior citizens in their homes
noun: a service, usually subsidized, and run by a social services department or voluntary body, which delivers hot meals to elderly or housebound people who might otherwise be unable to have them
uncountable noun: In Britain, meals on wheels is a service provided by the local authority that delivers hot meals to people who are too old or too sick to cook for themselves.

meals on wheels in American English
a program, usually one supported or subsidized by a charitable, social, or government agency, for delivering hot meals regularly to elderly, disabled, or convalescing persons who are housebound and cannot cook for themselves