1
as in major
having great meaning or lasting effect
the discovery of penicillin was a very important event in the history of medicine
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2
as in influential
having great power or influence
Rachel Carson was an important figure in the environmental movement
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3
as in arrogant
having a feeling of superiority that shows itself in an overbearing attitude
an important businessman who always expects special treatment wherever he goes
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4
as in proud
having too high an opinion of oneself
oh, you're so important—you think the world revolves around you
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important differences
significant differences
considerable differences
substantial differences
notable differences
crucial differences
an important contribution
a major contribution
an invaluable contribution
a valuable contribution
a vital contribution
a key contribution
an important role
important implications
major implications
serious implications
considerable implications
huge implications
meaningful implications
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Merriam-Webster unabridged
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