I think in this context it would mean "cooking for invalids" - invalid being an old-fashioned way of saying "unwell person". i.e it's a cookbook of what to feed ill people.
The food which is prepared by diet chef(person who makes food for sick person) for the sick person which can be easily digestible and cooked in clean and hygiene condition is called invalid cooking.
What invalid token mean when I'm trying to make a new password for draw something 2
invalid ip address means which password you who are not correct.
The meaning of the terms valid and invalid when applied to people can vary depending on how they are used. The word invalid can mean that a person is sick or has a disability. The term valid might mean that the person has an excellent career and family life.
it means that your to old or to young
Null means zero or invalid.
it means not working for you
in
what mean the itunes has an invalid signature the download has been removed form the system
means patient or disabled people
The person who referred you not valid.
It's an invalid arrangement of Roman numerals
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