from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To speak or write at length: expatiated on the subject until everyone was bored.
- intransitive v. To wander freely.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To range at large, or without restraint.
- v. To write or speak at length; to be copious in argument or discussion, to descant.
- v. To expand; to spread; to extend; to diffuse; to broaden.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To range at large, or without restraint.
- intransitive v. To enlarge in discourse or writing; to be copious in argument or discussion; to descant.
- transitive v. To expand; to spread; to extend; to diffuse; to broaden.
from The Century Dictionary and Cyclopedia
- To move at large; rove without prescribed limits; wander without restraint.
- To enlarge in discourse or writing; be copious in argument or discussion: with on or upon.
- To allow to range at large; give free exercise to; expand; broaden.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
Latin expatiārī, expatiāt- : ex-, ex- + spatiārī, to spread (from spatium, space).(American Heritage® Dictionary of the English Language, Fourth Edition)
From the participle stem of Latin expatiari, from ex- + spatiari ("walk about"). (Wiktionary)