1.Definition: having authority or ascendancy or influence
"An important official"
2.Definition: having or suggesting a consciousness of high position
"Recited the decree with an important air", "Took long important strides in the direction of his office"
3.Definition: important in effect or meaning
4.Definition: of extreme importance; vital to the resolution of a crisis
5.Definition: of great significance or value
"Important people", "The important questions of the day"