(obsolete) A touchstone; hence, stone of the sort used for touchstone.
(obsolete) Examination or trial by some decisive standard; test; proof; tried quality.
(music) The particular or characteristic mode of action, or the resistance of the keys of an instrument to the fingers.
(shipbuilding) The broadest part of a plank worked top and but, or of one worked anchor-stock fashion (that is, tapered from the middle to both ends); also, the angles of the sterntimbers at the counters.
“It will show you pretty well how pipped I was when I tell you that I near as a toucher put on a white tie with a dinner-jacket.”
“A marker must not move from his position except to observe whether a bowl is likely to become a toucher or to answer a question requiring a closer inspection.”
“A bowl, however, that is forced on to the jack by another is not a toucher.”
touchstone
A stone used to check the quality of goldalloys by rubbing them to leave a visible trace.
(figuratively, by extension) A standard of comparison or evaluation.