Black tuxedo jacket and matching trousers. Formal (piquÃ© or pleated front) white shirt. Shirt studs and cuff links. Black bow tie (silk, satin, or twill) Black cummerbund to match tie, or a vest. Dressy braces to ensure a good fit (optional) No gloves. Black patent shoes and black dress socks.
GCIDE(0.00 / 0 votes)Rate this definition: 1  Datum(n.) a single piece of information; a fact; especially a piece of information obtained by observation or experiment; -- used mostly in the plural. 2  Datum(n.) (Surveying) a point, line, or level surface used as a reference in measuring elevations. RHUD.
The datum is defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment. A total of 106,724 kilometers of leveling was involved, constituting 246 closed circuits and 25 circuits at sea level.