Meaning : Of great significance or value.
Example :
Important people.
The important questions of the day.
Synonyms : of import
Not important.
A relatively unimportant feature of the system.Meaning : Important in effect or meaning.
Example :
A significant change in tax laws.
A significant change in the Constitution.
A significant contribution.
Significant details.
Statistically significant.
Synonyms : significant
Meaning : Of extreme importance. Vital to the resolution of a crisis.
Example :
A crucial moment in his career.
A crucial election.
A crucial issue for women.
Synonyms : crucial
Of little importance. Not decisive.
noncrucialMeaning : Having authority or ascendancy or influence.
Example :
An important official.
The captain's authoritative manner.
Synonyms : authoritative
Meaning : Having or suggesting a consciousness of high position.
Example :
Recited the decree with an important air.
Took long important strides in the direction of his office.