to enlarge in discourse or writing; be copious in description or discussion: to expatiate upon a theme.
2.
Archaic. to move or wander about intellectually, imaginatively, etc., without restraint.
Origin: 1530–40; < Latin expatiātus past participle of ex(s)patiārī to wander, digress, equivalent to ex-ex-1 + spatiārī to walk about, derivative of spatiumspace; see -ate1
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
the offspring of a zebra and a donkey.
a stew of meat, vegetables, potatoes, etc.
a fool or simpleton; ninny.
a stew of meat, vegetables, potatoes, etc.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
1530s, "walk about, roam freely," from L. expatiatus, exspatiatus, pp. of expatiari, exspatiari "wander, digress," from ex- "out" + spatiari "to walk, spread out," from spatium (see space). Meaning "talk or write at length" is 1610s.