Important (adjective)

1. Having great significance or worth.
2. Having a high degree of relevance or urgency.

Origin:

From middle english importaunt, from old french important, from latin importāns, present participle of importāre ("to carry in, bring in, import").

Examples:

1. It's an important decision.
2. This is an important message.
3. He is an important person.
4. This is an important step.
5. It's important to be on time.