What is Thneed?
1.
A thing that is not required yet is purchased in great amounts anyways.
ie. a novelty
2.
"you need a thneed" is simply a marketing statement by the character in the book. A thneed is not REALLY needed, but is nonetheless purchased in great quantities and manufactured in great quantities to the detriment of the environment.
3.
An item, according to Dr Suess, which is most definately required.
You need a thneed.
See
