firstmost

superlative form of first: most first; first even among others of leading rank.

Adjective

  1. superlative form of first: most first; first even among others of leading rank.
    • "We've got more meat than we shall know what to do with, Edward. Take the horse, go down to Charlie Bell's ship-yard, borrow a tackle, and ask Edmund Griffin to come and help us dress him; but firstmost let's get him...
    • Apart from that I don't know the firstmost thing about getting divorced." I've found out all about it, Ma," she said. - 1948, Thomas Owen Beachcroft, Collected Stories of T.O. Beachcroft, page 363:
    • The firstmost thing I remember about him was something he told me, and I'll get to that in a minute. - 1991, Jim Ritchie, Shocco Tales: Southern Fried Sagas, page 39:

Origin

By surface analysis, first + -most.

Synonyms

first firstly foremost