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Definition of substantially

substantially

/səbˈstæn.ʃəl.i/
sub · stan · tial · ly
Adjective:substantial
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substantially Lexical Profile

substantially Game Scores & Validity

• adverb

1

To a great or significant extent; considerably.

Example

"The new manufacturing process has reduced energy consumption substantially over the past year."

2

In essence or main respects; essentially or for the most part.

Example

"Although the two witnesses gave slightly different accounts, their stories were substantially the same."

3

In a strong, solid, or sturdy manner.

Example

"The nineteenth-century stone farmhouse was substantially built to withstand harsh winter storms."

Synonyms
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Antonyms
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• Rhymes for substantially

• Nearby Words

substanceless
substandard
substantial
substantially
substantiate
substantiation
substantive

Word Origin & Etymology

Formed in Middle English from the adjective 'substantial' plus the adverbial suffix '-ly', tracing back through Old French to Latin 'substantialis' ('having substance or reality'), from 'substantia' ('essence, material').

Cite this Entry

Wordmom. (2026). Definition of Substantially. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/substantially
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