D defs.my
Entry 3 senses Webster, 1913

Demonstrate

/dĕm'-ən-strātˌ/ · Dem·on·strate · IPA /ˈdɛm.ənˌstɹeɪt/
01 v. t. To point out; to show; to exhibit; to make evident.
  1. 1.
    To point out; to show; to exhibit; to make evident.
  2. 2.
    To show, or make evident, by reasoning or proof; to prove by deduction; to establish so as to exclude the possibility of doubt or denial.
    “We can not demonstrate these things so as to show that the contrary often involves a contradiction.” Tillotson.
  3. 3.
    To exhibit and explain (a dissection or other anatomical preparation).(Anat.)