substantialism

noun

sub·​stan·​tial·​ism

plural -s

: either of two doctrines in philosophy:

a

: one holding that constant realities or substances underlie phenomena

b

: one holding that matter is a real substance rather than an aggregation of centers of force

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!