Foremost means in front of all the others, in position or in standing. The foremost expert, first and foremost, foremost among them.
It is almost always about rank rather than place: the foremost authority, one of the foremost writers of the century. First and foremost is the fixed phrase, meaning above all else. Note that foremost is a double superlative — Old English formest already meant first-most, and English then added the -most again for good measure, which is why it feels so emphatic.
1adjectiveforemostIn front of all the others in standing or position.
“She is one of the world's foremost experts on ancient Egyptian writing.”
synonyms: leading, principal
foremost is a quality of leading.
Old English formest already meant first-most, built from a superlative on a superlative. Modern English reanalysed it as fore plus most, which is a wrong reading that produced the right word.
Proto-Indo-European
*pr-
Proto-Germanic
*frumistaz
Old English
formest
English, today
foremost
Built from
From Old English formest, fyrmest (“earliest, first, most prominent”), from Proto-Germanic frumistaz, from the locative stem fur-, fr- + the superlative suffix -umistaz, stem ultimately from Proto-Indo-European pr-. The suffix -umistaz was a compound suffix, created from the rarer comparative suffix -umô (as in Old English fruma) + the regular superlative suffix -istaz (English -est); -umô in turn is from Proto-Indo-European -mHo-. Cognate with Old Frisian formest, Gothic 𐍆𐍂𐌿𐌼𐌹𐍃𐍄𐍃. See for, first and Old English fruma for more. Partially cognate to primus, from Proto-Indo-European pr- + Latin superlative suffix -imus, from Proto-Indo-European -mHo-. A comparative former was back-formed analogically, leaving the m from -umô in place. Later the Old English suffix complex -(u)m-est was conflated with the word most through folk etymology, so that the word is now interpreted as fore + most.
Etymology from Wiktionary, CC BY-SA