Of considerable importance, size, or worth. adjective
The company made a substantial investment in new technology.
She received a substantial amount of money as a gift.
Concerning the essentials of something. adjective
There is no substantial difference between the two proposals.
The report provided substantial evidence to support the claims.
Strongly built or made; sturdy. adjective
The house was built with substantial materials to withstand harsh weather.
He wore a substantial coat to keep warm during the winter.
Real and tangible rather than imaginary. adjective
The ghost stories lacked any substantial evidence.
The lawyer argued that the claims were not based on substantial facts.