English
expositionary
From exposition + -ary.
Formed from exposition + -ary
Proto-Indo-European *tḱey- ‘to cultivate’
…
Latin expōnō ‘to put forth’
Latin expositiō ‘exposition, exhibition’
Old French esposicion
Middle English exposicioun ‘the action of describing in writing’
English exposition
Today it means
adj Serving as exposition.
Language periods are conventional ranges, not dates for this word.
Etymograph / expositionary