Definitions for: Touchstone

[n] a basis for comparison; a reference point against which other things can be evaluated; "they set the measure for all subsequent work"

Webster (1913) Definition: Touch"stone`, n.
1. (Min.) Lydian stone; basanite; -- so called because used
to test the purity of gold and silver by the streak which
is left upon the stone when it is rubbed by the metal. See
Basanite.

2. Fig.: Any test or criterion by which the qualities of a
thing are tried. --Hooker.

The foregoing doctrine affords us also a touchstone
for the trial of spirits. --South.

Irish touchstone (Min.), basalt, the stone which composes
the Giant's Causeway.

Synonyms: criterion, measure, standard

See Also: baseline, benchmark, graduated table, medium of exchange, monetary system, norm, ordered series, point of reference, reference, reference point, scale, scale of measurement, standard of measurement, yardstick

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