Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to Pennsylvania.
  • adj. Of or belonging to the geologic time, system of rocks, or sedimentary deposits of the sixth period of the Paleozoic Era, characterized by the development of the amniotic egg, the appearance of the first reptiles, and widespread swamp forests. See Table at geologic time.
  • n. A native or resident of Pennsylvania.
  • n. The Pennsylvanian Period. Also called Upper Carboniferous.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An inhabitant or a resident of the state of Pennsylvania.
  • n. Any of the three Pennsylvanian epochs.
  • adj. Of any of the three geologic epochs (lower, middle and upper) within the Carboniferous period from 318 to 299 million years ago; marked by a high oxygen atmosphere and the rise of reptiles and winged insects.
  • adj. Of, or pertaining to the state of Pennsylvania.

from the GNU version of the Collaborative International Dictionary of English

  • proper n. The geological period from 280 million to 310 million years ago; -- it was characterized by a warm climate and abundance of swampy land.
  • proper n. A resident of the state of Pennsylvania.

from The Century Dictionary and Cyclopedia

  • Of or pertaining to Pennsylvania, one of the Middle States of the United States, lying south of New York and west of New Jersey.
  • n. A native or an inhabitant of Pennsylvania.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. from 310 million to 280 million years ago; warm climate; swampy land
  • n. a native or resident of Pennsylvania

Etymologies

After Pennsylvania .
(American Heritage® Dictionary of the English Language, Fourth Edition)
Pennsylvania +‎ -an (Wiktionary)

Examples

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