All-important (adjective)

Of the utmost importance; crucial.

Origin:

Formed by combining the words "all" and "important".

Examples:

1. The meeting was all-important, as the future of the company depended on its outcome.
2. He considered his education to be all-important in his career.
3. The all-important question of the evening was when the guests would arrive.
4. Her wedding day was the all-important event of her life.
5. The all-important goal is to reduce the number of accidents on the highway.