Most importantly.
In front, prominently forward.
First in time.
Positioned in front of (all) others in space, most forward.
Coming before (all) others in time.
Closest to the bow.
Of the highest rank or position; of the greatest importance; of the highest priority.
Very.
To a limited extent or degree.
More or less; a certain quantity or degree; a part, more or less; something.
A person or thing of importance; a somebody.