(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.

Alternative form of unity is strength

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

(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.

plural of disjoint union topology

plural of union wage premium

Synonym of former USSR

plural of Western Union splice

(historical) A nation in Eurasia that existed from December 30, 1922 to December 26, 1991.

Abbreviation of Union of Soviet Socialist Republics.