Definition of Welsh Assembly in US English:

Welsh Assembly

noun

  • (Also more fully "Welsh Assembly Government", in Welsh Llywodraeth Cynulliad Cymru) the Welsh administrative and legislative body, responsible for developing and implementing policy and some legislative functions specific to Wales; any of the buildings in Cardiff, Wales, housing this; (in early use also) this proposed political body.

Origin

Late 19th century; earliest use found in The Manchester Guardian.