- a crucial election.
- a crucial issue for women.
- a crucial moment in his career.
- a significant change in tax laws.
- a significant change in the Constitution.
- a significant contribution.
- an important official.
- important people.
- recited the decree with an important air.
- significant details.
- statistically significant.
- the captain's authoritative manner.
- the important questions of the day.
- took long important strides in the direction of his office.