An agreed method of measuring time; a specification or standard of either the rate at which time passes, or of points in time, or of both.

(economics) A monetary system where the value of circulating money is linked to the value of gold. / (figuratively) A test or measure of comparison that is considered ultimate or ideal.

(rail transport) A track gauge of 56.5 inches (1435 mm).

Alternative spelling of stand-alone

Alternative spelling of stand-alone

(physics, chemistry) An electrode with a standard electrode potential of zero; used as a standard against which other electrodes are measured.

an electrode potential measured under standard conditions; a temperature or 298K, 1 atmosphere pressure and at 1 mole of the activity of redox participants of the half-reaction.

(physics, chemistry) The international, standard conditions used to aid reproducibility; a temperature of 0 °C (273.15 K) and a pressure of 1 atmosphere (101.325 kPa). Abbreviated as STP.

(UK slang, derogatory) Utterly basic, ordinary, or standard; unremarkable, unexceptional, etc.

(statistics) A measure of how spread out data values are around the mean, defined as the square root of the variance. Represented with the Greek letter σ (sigma).