(printing) A maker's mark imprinted on a work to show that it is sanctioned by members of a trade union. It is often a tiny elongated rhomboid containing and surrounded by, in minuscule typeface, identifying names and the union's local chapter number.

(economics) The wage premium due to being in a trades union

plural of union wage premium

(electronics, telecommunications) A method of tightly joining two ends of metal wire by twisting each around the other.

(historical) The official English name of the country of South Africa from 1910 to 1961, a former country in Southern Africa and Commonwealth dominion under nominal British sovereignty until it became a republic in 1961.

plural of disjoint union topology

(topology) A topology which is applicable to the disjoint union of a given set of topological spaces and is the largest (most inclusive) topology that preserves the continuity of each contributing space as represented in the union.

Alternative form of unity is strength

an economic union between the Russian Federation, Belarus, Kazakhstan, Armenia and Kyrgyzstan

(US) A high school or high school district that serves students from more than one elementary school district.