(Canada, US) A continuous association of wage-earners for the purpose of maintaining or improving the conditions of their employment; a trade union.

A tee pipe fitting with female connections on all three ends.

An area in San Francisco.

The official name of Myanmar.

(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.

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.

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

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.