Definition of instrumentary in US English:

instrumentary

adjective

rare
  • 1Of the nature of or serving as an instrument or means; = "instrumental".

  • 2Law (chiefly Scottish Law). Of or relating to a legal instrument, such as a contract or deed. Chiefly in "instrumentary witness"noun a person who witnesses a deed.

Origin

Mid 16th century (in an earlier sense). From instrument + -ary.

Pronunciation

instrumentary

/ˌɪnstrʊˈmɛnt(ə)ri/