(idiomatic, chiefly literary) A child, especially from a marriage or similar union.

A multinational organisation consisting of 54 African nations.

A legal union similar to marriage, established to allow same-sex couples (and, in some jurisdictions, opposite-sex couples) rights similar to those married couples have.

(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.

(politics, historical) The situation of two or more states sharing the same monarch, usually also with shared dynastic succession.

Alternative spelling of antiunion

Alternative spelling of reunion

The flag of Great Britain or the United Kingdom. / (nautical, Britain) The flag flown on ships of the government of Great Britain or the United Kingdom.

plural of union bug

plural of union suit