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WordReference Random House Unabridged Dictionary of American English © 2024ex•pa•ti•ate (ik spā′shē āt′),USA pronunciation v.i., -at•ed, -at•ing. - to enlarge in discourse or writing;
be copious in description or discussion:to expatiate upon a theme. - [Archaic.]to move or wander about intellectually, imaginatively, etc., without restraint.
- Latin expatiātus past participle of ex(s)patiārī to wander, digress, equivalent. to ex- ex-1 + spatiārī to walk about, derivative of spatium space; see -ate1
- 1530–40
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