Definition of demonstrance in US English:

demonstrance

noun

rare
  • 1A thing or circumstance which establishes the truth of a claim or theory; (a piece of) proof or evidence.

  • 2Exhibition or outward display of a quality or feeling; an instance of this.

Origin

Late Middle English; earliest use found in John Lydgate (c1370–c1449), poet and prior of Hatfield Regis.

Pronunciation

demonstrance

/dɪˈmɒnstr(ə)ns/