Difference between Significant and Vast

SIGNIFICANT vs VAST: NOUN

A waste region; boundless space; immensity.
The darkness of night, in which the prospect is not bounded in by distinct objects: only in the following passage.
A great deal; a large quantity or number.
A boundless waste or space; immensity.
An immense space.
A vast space.

Reasonably large in number or amount
Having a covert or hidden meaning
Signifying something; carrying meaning.
The figures which remain to any number, or decimal fraction, after the ciphers at the right or left are canceled. .
Deserving to be considered; important; momentous.
Fitted or designed to signify or make known somethingl having a meaning; standing as a sign or token; expressive or suggestive.
Of or relating to observations or occurrences that are too closely correlated to be attributed to chance and therefore indicate a systematic relationship.
Fairly large in amount or quantity.
Having or likely to have a major effect; important.
Having or expressing a covert or nonverbal meaning; suggestive.
Having or expressing a meaning.
Rich in significance or implication
Fairly large
Important in effect or meaning
Having a noticeable or major effect; notable
Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
Too closely correlated to be attributed to chance and therefore indicating a systematic relation

Of considerable importance, size, or worth
Signifying something; conveying a meaning; having a purport; expressive; implying some character, and not merely denotative: as, a significant word or sound.
Serving as a sign or indication; having a special or covert meaning; suggestive; meaning: as, a significant gesture; a significant look.
Important; notable; weighty; more strictly, important for what it indicates, but also, often, important in its consequences: opposed to insignificant: as, a significant event.

Wide and vacant or unoccupied; waste; desolate; lonely.
Being of great extent or size; very spacious or large; enormous; massive; immense.
Very great in quantity, number, or amount.
3 and Colossal, gigantic, prodigious, tremendous, stupendous.
Synonyms Spacious.
Very great as to degree, intensity, difficulty of accomplishment, importance, etc.; mighty: used also in exaggerated colloquial speech, being much affected in the eighteenth century.

Earthshaking, Epochal, Momentous, Fundamental, Key, Remarkable, Important, Big, Profound, Meaningful, Monumental, Noteworthy, Large, Considerable, Substantial

Tremendous, Staggering, Gargantuan, Sizable, Substantial, Gigantic, Sizeable, Colossal, Considerable, Massive, Enormous, Big, Large, Huge, Immense

Earthshaking, Epochal, Momentous, Fundamental, Key, Remarkable, Important, Big, Profound, Meaningful, Monumental, Noteworthy, Large, Considerable, Substantial

Tremendous, Staggering, Gargantuan, Sizable, Substantial, Gigantic, Sizeable, Colossal, Considerable, Massive, Enormous, Big, Large, Huge, Immense

We have incurred significant net losses since our inception and we may continue to experience significant net losses in the future.
As it emerges as both a significant inward and a significant outward FDI country, China is adopting new approaches to international investment agreements.
These significant entity IGs, or significant entity management where applicable, are only required to submit a final legal representation letter and Management Schedule.
Energy and Consumers have significant obligations under these plans and hold significant assets in these trusts.
Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.
Significant Figures Worksheet; Significant Figures Handout Atoms and the Periodic Table Handouts.
Significant related party transactions not Significant numbers of bank accounts located in tax haven jurisdictions.
No person receives a significant settlement unless they have suffered real and significant injuries.
Significant contractor effort and significant Government monitoring is not sufficient to overcome difficulties.
No Significant Significant Significant Impact Impact with Impact Mitigation XIV.

Alaska is a very vast and unforgiving place.
The vast majority of febrile seizures are convulsions.
Job Losses Hint at Vast Remaking of Economy.
These errors constitute the vast majority of chargebacks.
Congress sought in the vast majority of cases.
So there is a vast number of people.
But the site has a vast customer base.
Vast data base which the setuid and setgid flags have a vast data base which the treasury.
Base and community involvement includes organizing, directing, planning, and supervising large base and community programs, overseeing vast operations, and assuming responsibility over vast population
That light has to travel across vast distances, which is also vast expanses of time, to reach us.