Coming before (all) others in time.
Positioned in front of (all) others in space, most forward.
Closest to the bow.
Of the highest rank or position; of the greatest importance; of the highest priority.
In front, prominently forward.
First in time.
Most importantly.
So much better than another as to be beyond comparison; matchless or unsurpassed.
Not able to be compared.
Something beyond compare; a thing with which there is no comparison.