Soon  adv. 1 in a short time (shall soon know). 2 relatively early (must you go so soon?). 3 readily or willingly (would sooner go; would as soon stay).  as (or so) soon as at the moment that; not later than; as early as (came as soon as i could). Sooner or later at some future time; eventually.  soonish adv. [old english]