fore·most 
(fôr
m
ōst
′)
adj.1. More prominent or important than others, especially in position or rank: the foremost researchers in the field. See Synonyms at chief.
2. First in physical position or place: the foremost ranks of the advancing warriors.
adv.1. Above all else; most importantly: was first and foremost a soldier.
2. In the front or first position: kept the idea foremost in her mind.
[Alteration of Middle English formest, first, from Old English; see per1 in the Appendix of Indo-European roots.]