expository Meaning, Definition & Usage

  1. adjective satellite serving to expound or set forth
    expositive.
    • clean expository writing

WordNet

Ex*pos"i*to*ry adjective
Definitions
  1. Pertaining to, or containing, exposition; serving to explain; explanatory; illustrative; exegetical.
    A glossary or expository index to the poetical writers. Johnson.

Webster 1913