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Definitions

substantial

[suhb-stan-shuhl] / səbˈstæn ʃəl /
ADJECTIVE
important, ample
Synonyms
STRONGEST
big consequential considerable extraordinary generous hefty large massive meaningful serious significant sizable solid steady strong valuable vast
STRONG
material
WEAK
abundant big-deal bulky durable firm goodly heavy heavyweight key major-league momentous plentiful principal sound stable stout sturdy superabundant tidy weighty well-built worthwhile
Antonyms
STRONGEST
broken inconsiderable insignificant intermittent little meaningless miniature minor selfish slight small soft tiny trivial unimportant untrustworthy useless weak worthless
WEAK
ethereal impoverished mental poor spiritual unsubstantial
ADJECTIVE
material, real
Synonyms
STRONGEST
actual material positive real solid
WEAK
card-carrying concrete corporeal existent for real honest-to-God honest-to-goodness legit objective phenomenal physical righteous sensible sure-enough tangible true valid visible weighty
Antonyms
WEAK
ethereal impoverished insignificant little mental minor poor small spiritual unimportant unsubstantial
ADJECTIVE
rich
Synonyms
STRONGEST
solid
WEAK
affluent comfortable easy opulent prosperous snug solvent wealthy well well-heeled well-off well-to-do
Antonyms
WEAK
ethereal impoverished insignificant little mental minor poor small spiritual unimportant unsubstantial

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It operates in highly fragmented segments that give us a substantial runway for consolidation, which aligns perfectly with our long-term goal of becoming a $50 billion revenue company.

From MarketWatch • May 6, 2026

CK Hutchison said the substantial cash proceeds will help strengthen the company’s financial position by boosting cash reserves and reducing debt.

From The Wall Street Journal • May 5, 2026

One, Pam Bondi was formerly the attorney general of Florida, a substantial job, a job that requires some management, but she’s an expert in Florida state law.

From Slate • May 4, 2026

"It will take a substantial amount of time before those species and communities recover."

From BBC • May 2, 2026

As time progressed, Aditya became more and more fleshed out, more substantial.

From "When Dimple Met Rishi" by Sandhya Menon

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