Expatiate is defined as to give extensive details when speaking or writing.(verb)
An example of expatiate is someone taking twenty minutes to tell you what they had for lunch.
See expatiate in Webster's New World College Dictionary
See expatiate in American Heritage Dictionary 4
intransitive verb ex·pa·ti·at·ed, ex·pa·ti·at·ing, ex·pa·ti·ates
Origin: Latin expatiārī, expatiāt-
Origin: : ex-, ex-
Origin: + spatiārī, to spread (from spatium, space).
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