1. need not - Noun
2. need not - Verb
(chiefly UK, auxiliary, indicating absence of necessity) do not have to, do not need to.
(auxiliary, indicating inadvisability) Ought not to.
need-not (plural need-nots)
(rare) Something that is not needed or is excessive.
need-not
If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them. Henry David Thoreau
If God has made the world a perfect mechanism, He has at least conceded so much to our imperfect intellect that in order to predict little parts of it, we need not solve innumerable differential equations, but can use dice with fair success. Max Born
There is a species of person called a 'Modern Churchman' who draws the full salary of a beneficed clergyman and need not commit himself to any religious belief. Evelyn Waugh
When the snake is in the house, one need not discuss the matter at length. Somali Proverb
When a man is coming toward you, you need not say, "Come here." Ghana Proverb
The one who sits on the ground need not fear a fall. Czech Proverb