D defs.my
Entry 3 senses Webster, 1913

Illustration

/ĭlˌ-əs-trāsh'-ən/ · Il·lus·tra·tion · IPA /ˌɪl.əˈstɹeɪ.ʃən/
01 n. The act of illustrating; the act of making clear and distinct; education; also, the state of being illustrated, or of being made clear and …
  1. 1.
    The act of illustrating; the act of making clear and distinct; education; also, the state of being illustrated, or of being made clear and distinct.
  2. 2.
    That which illustrates; a comparison or example intended to make clear or apprehensible, or to remove obscurity.
  3. 3.
    A picture designed to decorate a volume or elucidate a literary work.