: not substantial: such as. a : lacking substance or material nature. b : lacking firmness or solidity : flimsy.

What does insubstantial evidence mean?

Insubstantial is an adjective that means lacking form, substance or nutritional value. If you're really hungry, a bowl of clear broth will seem pretty insubstantial. If there is insubstantial evidence to convict an accused criminal, he will be set free.

How do I use insubstantial?

The information gathered was insubstantial. The higher estimate is not insubstantial. We would perhaps like things to move more quickly, but it is not an insubstantial grant. I can understand that, as we now know how insubstantial was the basis on which the figures were produced.